The death toll from a suicide bomb attack on a wedding reception in Afghanistan's capital, Kabul, has risen to 80, two senior officials said on Wednesday.

Afghan authorities were struggling on Wednesday to identify the group behind a suicide bomb attack that killed at least 55 people at a gathering of religious scholars in Kabul after the Taliban denied any responsibility.

Afghan President Ashraf Ghani condemned Monday's suicide bomb attack outside a peace tent gathering of Muslim clerics in Kabul and backed their fatwa against suicide attacks, saying they violated the tenets of Islam.

At least 13 people were killed and more than 50 wounded in a dual suicide bomb attack at a busy morning market in northeast Nigeria on Saturday, according to local sources.

A double suicide bomb attack hit a police station in Syria's capital Damascus on Monday, state media said, with a monitor saying at least 11 people were killed.

A suicide bomb attack outside a government office in northwest Pakistan on Tuesday left at least one person dead and 17 injured, officials said.

Turkish police on Wednesday detained two Islamic State suspects accused of plotting a suicide bomb attack on New Year's Eve celebrations in the capital Ankara.