A merchant vessel experienced an attempted boarding while off Lagos, Nigeria, in the Gulf of Guinea, according to a piracy alert.

The ship's crew sounded the alarm during the incident at 0001 UTC Saturday at the port's anchorage area, according to a bulletin from the Maritime Domain Awareness for Trade-Gulf of Guinea (MDAT-GoG).

The crew also contacted a security vessel, at which time the attacker fled. The approached ship was not named in the alert.

Nothing was stolen, and the vessel and crew are safe, MDAT-GoG reported.

Vessels transiting the area are advised to exercise extreme caution.

The episode occurred three days after a bulk carrier was reportedly fired upon Wednesday in the Bight of Bonny.

No one was hurt as the ship sped away while two or three men in two speed boats approached on the starboard beam and shot at it, MDAT-Gog stated.

The ship, also not named in the report, was attacked 40 nautical miles south of Nigeria's Bonny Fairway Buoy.

Last Sunday, a cement carrier was attacked by pirates in the Gulf of Aden but was reported safe in the high-risk area off of Somalia.