A series of bomb blasts at two bus stations in the northern Nigerian city of Gombe killed at 37 people and wounded 105 more on Wednesday evening. The first blast happened at about 7:00 pm (1800 GMT) at a mosque at Dadin Kowa motorpark as people gathered to pray, two witnesses told Al Jazeera. Umaru Sani, a shopkeeper, said a second bomb went off at Nasarawo junction near the same bus station, where people were selling vegetables.

"I heard two loud explosions, one after the other; I saw people coming out of the mosque with blood gushing out ... I counted about seven dead bodies," Ahmed Abu, a bus driver, said.

No individual or group has claimed responsibility for the bombings, but many suspect that this is the work of the Islamist jihadi group Boko Haram, who have increased the frequency and intensity of its attacks since Muhammadu Buhari became president on May 29, according to NDTV.

An official with the National Emergency Management Agency said at least seven people had been killed but they were still picking up bodies from the blast sites. Another two blasts occurred at the gate of the major Duku bus station and a small nearby market, according to Ghana Web.

"I was going towards my house when I heard two loud explosions coming from Kasuwar Mata ... on arrival at the scene, I saw many dead bodies, I cannot count how many because it was getting dark," Hussaini Adamu, a farmer, said, according to Reuters.

Police spokesman Fwaje Ajiri said that he could not give a definitive death toll yet but confirmed that there were blasts in both areas about an hour apart. He confirmed there was at least one blast in each location. 

Last week, Gombe was the target of two bombings that killed 50 people.