* Smaller peer Kaisa also set to miss payment deadline
* Evergrande at heart of Chinese property sector crisis
* Government says Evergrande problems can be contained
Some offshore bondholders of China Evergrande Group did not receive coupon payments by the end of a 30-day grace period, five people with knowledge of the matter said, pushing the cash-strapped property developer closer to formal default.
Adding to a liquidity crisis in China's once bubbling property market, smaller peer Kaisa Group Holdings was also unlikely to meet its $400 million offshore debt deadline on Tuesday, a source with direct knowledge of the matter said.
Failure by Evergrande to make $82.5 million in interest payments due last month would trigger cross-default on its roughly $19 billion of international bonds and put the developer at risk of becoming China's biggest defaulter - a possibility looming over the world's second-largest economy for months.
Non-payment by Kaisa would push the 6.5% bond of Kaisa, China's largest holder of offshore debt among developers after Evergrande, into technical default, triggering cross defaults on its offshore bonds totalling nearly $12 billion.
Evergrande did not respond to Reuters request for comment. Kaisa, which in 2015 became the first Chinese developer to default on an offshore bond, declined to comment.
All the sources declined to be named as they were not authorised to talk to the media.
Evergrande was once China's top property developer, with more than 1,300 real estate projects. With $300 billion of liabilities, it is now at the heart of a property crisis in China this year that has crushed almost a dozen smaller firms.
The government has repeatedly said Evergrande's problems can be contained and moves to boost liquidity in the banking sector along with the firm's plans to forge ahead with a restructuring of its overseas debt have helped reassure global investors.
Strategist Kenny Ng at Everbright Sun Hung Kai Securities said investors had expected the Evergrande non-payment and "just waited to see when this will happen".
"At the same time, investors are watching the development of Evergrande, including whether it is heading for debt restructuring or its creditor repayment plan," Ng said.
Evergrande has not issued any communication to bondholders about the missed payment, one of the five sources said.
The developer had said on Monday it had established a risk-management committee that included officials from state entities to assist in "mitigating and eliminating the future risks".
That came after it said creditors had demanded $260 million and it could not guarantee funds to repay debt, prompting the authorities to summon its chairman and reassure markets that broader risk could be contained.
Rating agency S&P said on Tuesday the $260 million repayment demand showed Evergrande's liquidity remained "extremely weak", with a default looking inevitable especially given maturities totalling $3.5 billion in March and April 2022.
So far, any Evergrande fallout has been broadly contained in China and with policymakers becoming more vocal and markets more familiar with the issue, consequences of its troubles are less likely to be widely felt, market watchers have said.
State involvement and hope of managed debt restructuring helped lift Evergrande stock as much as 8.3% a day after diving 20% to a record closing low. Still, it ended Tuesday up only 1.1% while its bonds continued to trade at distressed levels.
Notes due on Nov. 6, 2022, - one of two tranches with a coupon payment deadline that passed on Monday midnight in New York - traded at 18.282 cents on the dollar, Duration Finance data showed, little changed from a day earlier.
Founded in 1996, Evergrande epitomised a freewheeling era of borrowing and building. But that business model was scuttled by hundreds of new rules designed to curb developers' debt frenzy and promote affordable housing.
Evergrande became one of several developers subsequently starved of liquidity, prompting offshore debt default and credit-rating downgrades, and a plunge in the value of developers' stocks and bonds.
A string of developers have scrambled to raise funds by selling shares and assets. Only some have found takers.
Shimao Group and Logan Group both announced on Tuesday a top-up share placement to raise around $150 million each, while Guangzhou R&F Properties said it had agreed to sell a 30% stake in a Guangzhou logistics park.
For Kaisa, the risk of defaulting emerged after it failed to make a notes exchange deal with bondholders last week.
To avoid default, bondholders owning over 50% of notes due on Dec. 7 and Kaisa notes worth a total of $5 billion, sent the company draft terms of forbearance late on Monday, a separate source with direct knowledge of the matter said.
Even in the case of a technical default, Kaisa and offshore bondholders could discuss forbearance terms, two sources with knowledge of the matter said.
Kaisa, whose shares rose 1.1% on Tuesday, said it was open to discussion on forbearance, without elaborating.
Sources previously said bondholders had offered Kaisa $2 billion in funding last month but the offer had not progressed.