Residents and sources close to Hamas said on Monday (April 20) members of an Israeli-backed militia operating in an area under Israeli control clashed with Palestinian fighters after crossing into a Hamas-run area east of Khan Younis.

As the militiamen tried to retreat, a Hamas fighter fired an anti-tank grenade towards their vehicle, some residents and a Hamas source said. An explosion was heard, but there was no word about casualties.

A video, verified by Reuters, showed gunmen apparently from the militia dressed in black uniforms and clutching AK assault rifles arriving at a Hamas-run area in eastern Khan Younis before shooting is heard.

Reuters confirmed the location and the date of the video by the original file metadata. Buildings, damaged structures, and road layout matched with satellite imagery.

There was no comment from either Hamas, which brands such groups as "Israeli collaborators," or the militia, about the incident.

The emergence of the groups, though they remain small and localized, has added to pressures on Islamist Hamas and could complicate efforts to stabilize and unify a divided and shattered Gaza. The groups remain unpopular as they operate under Israeli control.

DESCRIPCIÓN DE IMÁGENES

KHAN YOUNIS, GAZA (APRIL 20, 2026) (ORIGINALLY SHOT IN PORTRAIT) (OBTAINED BY REUTERS - Access all)

1. MASKED GUNMEN MOUNTING VEHICLES AND ON THE GROUND / AUDIO OF GUNSHOTS FIRED / PALESTINIANS GATHERING AND RUNNING

2. PALESTINIANS GATHERING NEAR MASKED GUNMEN / AUDIO OF GUNSHOTS FIRED

3. GUNMEN ON TOP OF VEHICLES AND ON THE GROUND / AUDIO OF GUNSHOTS FIRED / PALESTINIANS RUNNING AWAY

KHAN YOUNIS, GAZA (APRIL 20, 2026) (OBTAINED BY REUTERS - Access all)

4. VARIOUS OF MASKED GUNMEN STANDING AND SPEAKING WITH GATHERED PALESTINIANS / AUDIO OF GUNSHOTS

5. GUNMAN FIRING SHOTS IN THE AIR / PALESTINIANS RUNNING AWAY

KHAN YOUNIS, GAZA (APRIL 20, 2026) (ORIGINALLY SHOT IN PORTRAIT) (OBTAINED BY REUTERS - Access all)

6. VEHICLES DRIVING AWAY / EXPLOSION / CAMERA COVERED WITH AUDIO OF MAN HEARD (Arabic): "They were hit, they were hit..."

7. PEOPLE GATHERING / FIRE AND SMOKE IN THE BACKGROUND