Merchant vessels have been warned to exercise extreme caution after a pirate group was spotted off the coast of Yemen in the Gulf of Aden.

The incident occurred at 0748 UTC on Saturday between Yemen and Djibouti, according to the United Kingdom Maritime Trade Operations (UKMTO).

The 63,000-dwt CL Lindy (built 2017), operated by Cosco Wallem Shipmanagement, reported a suspicious approach by 11 skiffs with four to five people on board.