At least 15 people have been killed and 41 injured in two suicide bomb attacks that hit the Nigerian capital, Abuja, on Friday night.
Separate reports from the Nigerian National Emergency Management Agency say 18 people have died after three people died in hospitals this morning.
While no group has claimed responsibility for the attacks, they bear the hallmarks of Boko Haram militants.
They were the first bomb attacks in the capital since a blast at a bus station killed at least 71 people in April 2014. Authorities blamed Boko Haram for that attack.
One of the bombs in yesterday's attack went off near a police station in the satellite town of Kuje, not far from the capital's airport.
The second blast occurred in a crowded area in the suburb of Nyanya, not far from the site of the April 2014 attack.
"Preliminary investigations revealed the bomb blasts were carried out by two suicide bombers, a male and a female," Abuja police said in a statement.
Attacks by the Islamist group have lately been concentrated in Nigeria's northeastern Borno state, the birthplace of the insurgency, and northern parts of neighbouring Adamawa state.
The Abuja blasts came a day after at least 10 people were killed when four suicide bombers blew themselves up Maiduguri, the capital of Borno, and 11 villagers died in neighbouring Adamawa state.
Since losing most of the territory it took over earlier this year, Boko Haram has reverted to hitting soft targets like markets, bus stations and places of worship as well as hit-and-run attacks on villages in the northeast.
The United States also condemned the blasts and other recent Boko Haram deadly attacks.
"The United States strongly condemns the dual explosions in the Nyanya and Kuje areas of Abuja on 2 October, and the suicide bombings and militant attacks in Maiduguri and Adamawa on 1 October," the US embassy said in a statement.
"We extend our deepest condolences to the families and loved ones of those killed and injured," it said.
"These tragic events are stark reminders that violent extremists will stop at nothing to inflict horrific and indiscriminate harm upon innocent lives. In particular, Boko Haram's reign of terror and sheer brutality have left thousands dead and millions displaced," it added.
