Two bodies of the Palestinian militants were found in eastern Gaza Strip Tuesday, the second day of violence between Israel and Palestinian militant groups that so far left six people dead.

The two were wounded in an Israeli military strike near the border fence to the east of central Gaza Strip. Israel allowed the ambulance to reach the area in the morning but the wounded were already dead, medical sources said.

The paramedics are still searching inside the buffer zone for a third missing person.

The Israeli army said it struck militants who were about to put an explosive device in the no-go area that Israel established along its borders with the Gaza Strip.

On Monday, four Palestinians were killed, including two Islamic Jihad members, in two Israeli army strikes in northern Gaza Strip.

The armed wing of Hamas, the Islamic movement that controls Gaza, announced its responsibility for firing four rockets into southern Israel. The declaration is the first in months, as Hamas committed to an unofficial ceasefire that took effect after the end of Israel's Operation Cast Lead against Gaza in January 2009.

Israel said two projectiles landed on its territories and caused no damage or casualties.