Palestinian Authority forces are clashing with armed groups in the occupied West Bank in a rare crackdown aimed at restoring order in a militant stronghold.

JENIN, West Bank — The black-clad militants of Jenin refugee camp raced through sewage-filled alleyways to dodge gunfire echoing all around. “Quickly,” a Palestinian fighter urged as they weaved through a network of armed patrols and improvised barricades. “Watch out,” another warned at a juncture where an improvised explosive was being set.

The authority, which has struggled to crack down on powerful armed groups in the territory, is under pressure from the United States to escalate law-and-order operations.

Following a ten-day siege, the Palestinian Authority began, on December 14, a violent raid on the Jenin refugee camp in the northern West Bank. The PA security forces used similar tactics as used by the Israeli occupation forces in their routine attacks on the area.