Prime minister says Islamic State are the most likely suspects for the attack on Turkey's biggest airport.
A dejected Messi has said he will walk away from the international game after losing a fifth major final with Argentina.
Cameron has said he will step down by October following the historic referendum on Thursday.
Despite earlier reports in the German media that between 20 and 50 people were hurt, police said none of the hostages were injured in the attack.
US President Barack Obama described the Orlando shooter as a 'homegrown extremist', and survivors tell of the June 12 rampage that left 50 dead.
Paralympian and Olympian Oscar Pistorius fell from grace when he shot and killed his girlfriend Reeva Steenkamp. We take a look at the events.
The world-renowned boxer and political activist died on Friday. He was 74. Over 14 000 people met to honour him at his Thursday jenazah, or funeral.
The International Tennis Federation banned the tennis champion for two years after she tested positive for banned drug meldonium earlier this year.
The former player and African Nations Cup winner is suspected to have died from a heart attack on Wednesday.
Hillary Clinton won the Democratic primary in the US territory on Sunday and could confirm nomination as early as Tuesday.