An Israeli Navy boat on patrol off the coast of Ashkelon capsized Monday morning about 1.5 kilometers (1 mile) from shore, the army said.

The small boat’s crew abandoned the vessel and began swimming ashore before being picked up by a second patrol boat. The army said no one was injured in the incident.

Several navy vessels were dispatched to the scene and were examining the overturned boat. The cause of the accident was not immediately clear.

The boat, belonging to the Navy’s Tzir’a (Wasp) class, is a highly maneuverable vessel used for patrols, port security, and transportation of divers. It usually carries a five-man crew.