A speedboat carrying Maldives President Abdulla Yameen was hit by a blast while approaching the capital city of Male on Monday, but the president was reportedly 'unhurt' in the incident. 

The President had landed at the main international airport on a nearby island after returning from the Haj pilgrimage in Saudi Arabia. 

The blast comes just a month after a death threat issued against the Madlives President in a video message that the Isis logo. 

While the Maldives president escaped unhurt, the First Lady Fathmath Ibrahim received injuries and is being treated, according to The Maldives Independent. 

President Abdulla Yameen's bodyguard also received serious injuries, the report said. 

A loud blast was heard from the boat, followed by the shattering of glass and the breaking of the door of the boat, the news site reported.

It is not clear what caused the blast and the police are investigating the incident.

"We do not know if this is an accident. The speedboat is with the army. We do not know if it was mechanical, deliberate or if something was planted. The Maldives National Defence Force [MNDF] will not rule anything out," the Maldives President's Office Minister Mohamed Shareef told The Maldives Independent.

The explosion follows a threatening video message posted on Youtube bearing the Isis logo, in which three gunmen were seen threatening to kill the President within 30 days unless the government withdrew its new anti-terrorism legislation. The authenticity of the video has not been verified. 

The men also demanded the release of Adhaalath Party president Sheikh Imran Abdulla, local media reported. 

The explosion occurred at 8 am local time on Monday.