Pirates have seized a tanker off Madagascar in the Indian Ocean and are sailing it towards the Somali coast.
The ship's owners in Norway said the UBT Ocean was carrying oil from the United Arab Emirates to Tanzania.
A Saudi ship, the al Nisr al Saudi was also seized in the Gulf of Aden on Monday
The BBC reports the seas off the Horn of Africa are among the most dangerous in the world.
Attacks usually increase between March - May when the seas are calmer.