Israeli troops battled Palestinian fighters in Khan Younis in southern Gaza and destroyed tunnels and other infrastructure, as they sought to suppress small militant units that have continued to hit troops with mortar fire, the military said on Friday.

The Israeli Defence Forces (IDF) said troops had killed around 100 Palestinian fighters since Israeli troops began their latest operation in Khan Younis on Monday, which continued as pressure mounted for a deal to halt the fighting.

It said seven small units that had been firing mortars at the troops were hit in an air strike, while further south, in Rafah, four fighters were also killed in air strikes.

The Islamic Jihad armed wing said it fired rockets toward the southern Israeli city of Ashkelon and other Israeli towns near Gaza. No casualties were reported, the Israeli ambulance service said.

The continued fighting, more than nine months since the start of Israel's invasion of Gaza following the Oct. 7 attack, underlined the difficulty the IDF has had in eliminating fighters who have reverted to a form of guerrilla warfare in the ruins of the coastal strip.

A Telegram channel operated by the armed wings of Hamas and Islamic Jihad, the two main militant groups in Gaza, said fighters had been waging fierce battles with Israeli troops east of Khan Younis with machine guns, mortars and anti-tank weapons.

Medics said at least six Palestinians were killed in Israeli strikes in eastern Khan Younis.