Twin blasts at a packed bus station in Nigeria's capital killed "dozens of people" on Monday, a spokesman for the state-run emergency services said.
"It's correct to say dozens of people were killed following the bomb blasts in Nyanya Bus Park this morning," Manzo Ezekiel of the National Emergency Management Agency (NEMA) told AFP.
Boko Haram Islamists have launched several attacks on Abuja, including bombings, but Ezekiel said the cause of the latest blast was not yet known.
Security officials were also at the scene and were working to determine the nature of the blast.
Boko Haram is blamed for scores of attacks across northern and central Nigeria that have killed thousands since 2009.
In 2011 it carried out a suicide car bombing at a United Nations building in Abuja that killed at least 26 people, one of its most prominent attacks.
Most of the group's recent violence, however, has been in the remote northeast of the country.
An attack on the outskirts of Abuja would cast further doubt on the military's claim that the insurgents have been weakened and lack the capacity to strike prominent targets.
