Top news of week: Republican National Convention, Chadwick Boseman's death, and more

In the United States of America, it was a night like no other as the grand finale of the Republican National Convention was nothing short of a blockbuster.

A refugee rescue vessel funded by British street artist Banksy called for urgent help late Friday after lending assistance to a boat in the Mediterranean that was carrying at least one dead migrant.

The boat, named 'Louise Michel' after the 19th-century French feminist anarchist, said it was "reaching the State of Emergency" after encountering the boat 130 people as they attempted to cross the expanse dividing Europe and Africa.

Turkey on Saturday launched new military manoeuvres in the eastern Mediterranean expected to last two weeks, in a sign that heightened tensions between Ankara and Athens were likely to continue.

A dispute over maritime borders and gas drilling rights has reignited the long-running rivalry between Greece and Turkey, with the two neighbours staging rival naval drills.

Barcelona legend Lionel Messi on Tuesday has asked to leave his club this summer. 

The Argentine sent a fax to the club saying that he wants to exercise a clause in his contract that allows him to leave for free with immediate effect. 

However, Barcelona has said that the clause has expired and Lionel Messi will have to stay with the club until 2021 with a buy-out clause of 700 million euros as per the contract.

The board is set to meet soon. Some say that Messi could stay in the club if Barcelona's president, Josep Maria Bartomeu, resigns, while the others feel that the player is determined to leave the club no matter what. 

Actor Chadwick Boseman, best known for his role in Black Panther, has died of colon cancer. He was 43.

His family confirmed the news on Twitter Friday night, saying “he died in his home, with his wife and family by his side.”