Fierce fighting is taking place in northern Gaza as Palestinian soldiers battle Israeli troops after they launched another deadly ground incursion, Al Jazeera reports.

Dozens of bodies reportedly line the narrow allies of the Jabalia refugee camp as medical teams are unable to reach them.

Qassam Brigades, Hamas’ armed wing, said one Israeli soldier was killed in close-quarter combat “and immediately upon the arrival of the rescue force, its members were targeted with an anti-personnel ‘thunder’ bomb, killing and wounding them” in the al-Tawam area, northwest of Gaza City.

The Israeli military said it killed about 20 Palestinian fighters in air strikes and street battles in Jabalia. At least seven civilians, including women and children, were also killed in the besieged camp, sources from the nearby Kamal Adwan Hospital said.