"We couldn't see anything. Nothing but body parts," the groom's brother Sükrü Akdoğan said.

Television footage showed white sheets covering dozens of bodies at the scene before forensic teams arrived.

Gülser Ateş, who was wounded in the attack, said she had been talking to one of her neighbours when the bomb exploded.

"I don't know what happened. The only thing I know is that my neighbour died on top of me," she said.

"If she had not fallen on me, I would have died, too. Her body saved me."

Turkish authorities imposed a temporary blackout on coverage of the attack on Sunday.

Isil has carried out a string of bombings in major Turkish cities over the past year. Besides bombings at symbolic sites, it has previously sought out Kurdish targets in an apparent bid to inflame tensions.

The last attack was in June, when more than 40 people were killed in a triple suicide bombing at Istanbul's main airport. The deadliest so far was in October last year, when suicide bombers killed more than 100 people at a predominantly-Kurdish rally in Ankara.

Condemning the attack, Mr Erdogan said: "Our country and nation only have a single message to those who attack us: you will not succeed."