JERUSALEM: Israeli troops fired a mortar shell over the ceasefire line into a Palestinian residential area in the Gaza Strip, in the latest incident to rock the tenuous ceasefire with Hamas. Health officials said at least 10 people were wounded, and the army said it was investigating.

The military said the mortar was fired during an operation in the area of the “Yellow Line,” which was drawn in the ceasefire agreement and divides the Israeli-held majority of Gaza from the rest of the territory.

The military did not say what troops were doing or whether they had crossed the line. It said the mortar had veered from its intended target, which it did not specify.

Fadel Naeem, director of Al-Ahli Hospital, said the hospital received 10 people wounded in the strike on central Gaza City, some critically.

It was not the first time since the ceasefire took effect on Oct. 10 that Israeli fire has caused Palestinian casualties outside the Yellow Line. Palestinian health officials have reported over 370 deaths from Israeli fire since the truce.