GAZA CITY (Ma'an) -- The death toll in Gaza rose to 9 early Monday following overnight Israeli airstrikes on the besieged enclave, a Hamas spokesman said.
Sami Abu Zuhri told Ma'an that six Hamas fighters were killed by Israeli airstrikes on a tunnel in Rafah overnight. The victims were buried under the debris and only found early Monday.
Israeli media said the fighters were killed in a tunnel collapse, and not as a result of an Israeli airstrike.
The fighters were identified as Ibrahim Balawi, 24, Abdul-Rahman al-Zamili, 22, Mustafa Abu Mur, 22, his twin brother Khalid, Sharaf Ghannam, 22, and Juma Abu Shalouf, 24.
Another militant affiliated with the al-Qassam Brigades succumbed to wounds sustained in an Israeli airstrike which targeted a military training base east of Rafah, Hamas said.
"The enemy's assassination of a number of fighters affiliated to the al-Qassam Brigades is a dangerous escalation for which the enemy will pay a toll," Abu Zuhri said.
A child, two teenage girls and two men were injured by an Israeli airstrike on Beit Hanoun, a Palestinian medical official said.
Strikes were also reported in Khan Younis and Gaza City, with no injuries reported.
Earlier, two Palestinian militants were killed by an Israeli airstrike on al-Bureij refugee camp in central Gaza.
A newly formed military group identified in a statement as Abdul-Qadir al-Husseini Brigades said the two men were members.
They were identified as Mazin al-Jidya and Marwan Salim.
The An-Nasser Saladin Bridages, the military wing of the Popular Resistance Committee, said its fighters launched two rockets at southern Israel overnight.
An Israeli soldier was lightly injured by shrapnel from rocket fire in the Eshkol regional council, Israeli media reported.
The Israeli army said it had "targeted nine terror sites and concealed rocket launchers across the Gaza Strip", noting in a statement its attacks came after militants had fired over 25 mortars and rockets at Israel on Sunday.
It said militants had fired an anti-tank missile at an army patrol by the border fence, causing no casualties.