Sources at the coastguard in the Red Sea said that a Yemeni fisherman was killed as two shells hit his boat which entered Sudan's territorial waters.

Two shells directly struck the boat boarding four fishermen as it entered the Sudanese waters killing one of the fishermen, Hussein Ibrahim and injuring another, the sources said two of the four fishermen managed to escape unharmed.

The coastguards became aware of the incident through the three survivors.

Last week, two Yemeni fishermen were injured as their boats were shot by international forces patrolling the Indian Ocean. 

Earlier last week, a French helicopter set fire at a Yemeni boat suspecting it was for pirates. 

Two days later, a Russian warplane fired on a Yemeni boat as it was out of the country's territorial waters.