Gaza's civil defence agency said Israeli air strikes and shelling killed at least 18 people across the territory on Tuesday, including children.
Agency spokesman Mahmud Bassal said the strikes primarily targeted Deir el-Balah, Gaza City and the Khan Yunis area.
"Last night was harsh and bloody," Bassal told AFP, accusing Israel of conducting "dozens of air and artillery strikes across all areas of the Strip".
"Eighteen people were killed and dozens injured" in strikes on a tent and several homes in Deir el-Balah, Khan Yunis and Gaza City, he added.
Ten people, including a one-year-old girl, were killed when a strike hit the home of the Abed family in the Al-Manara area of Khan Yunis, Bassal said.
The other deceased included the child's parents, grandfather and uncle, he added.
In a separate strike, four children were killed when a home belonging to the Abu al-Shaar family in the Al-Daraj neighbourhood of Gaza City was struck, Bassal said.
Another strike hit a tent filled with displaced Palestinians, killing three people in the Deir el-Balah area, he added.
Witnesses said an Apache helicopter fired on areas of Jabalia in northern Gaza, where Israeli forces have been conducting a sweeping offensive since October.
The latest strikes occurred as a "final round" of talks to reach a ceasefire and hostage release deal was due to begin in Qatar, according to a source briefed on the negotiations.
Gaza health ministry said on Tuesday that 61 people were killed in the Palestinian territory in the past 24 hours, taking the overall war death toll to 46,645.
The ministry said at least 110,012 people have been wounded in more than 15 months of war.
A Palestinian man rushes an injured five-year-old boy into a hospital after an Israeli strike, in Deir el-Balah in the central Gaza Strip, on Tuesday. AFP
A Palestinian man carries an injured girl into a hospital after an Israeli strike, in Deir el-Balah in the central Gaza Strip, on Tuesday. AFP
A Palestinian man carries an injured girl into a hospital after an Israeli strike, in Deir el-Balah in the central Gaza Strip, on Tuesday. AFP
Palestinians mourn the death of their relatives, including children, who were killed in an Israeli airstrike on their shelter in Deir el-Balah in the central Gaza Strip, on Tuesday. AFP
Palestinians inspect a destroyed tent shelter following Israeli airstrikes at a makeshift displacement camp in Deir el-Balah in the central Gaza Strip, on Tuesday. AFP
A man inspects the remains of a site that was hit by Israeli bombardment east of Khan Yunis in the southern Gaza Strip, on Tuesday. AFP
A child stands amidst debris and rubble by a collapsed building at the site of Israeli bombardment on a residential block in Jalaa Street in Gaza, City on Tuesday. AFP
A woman sits with a child with salvaged footwear amidst debris and rubble at the site of Israeli bombardment on a residential block in Jalaa Street in Gaza City, on Tuesday. AFP