A bus attack in Nairobi killed at least six people and injured dozens on Saturday as Kenyans continue to celebrate 50 years of independence, Al Jazeera reported.
"We lost two of the victims in hospital where about 30 others are still admitted," said Nairobi police chief Benson Kibue. "We now have six people dead out of that incident."
According to police, they currently have a suspect in custody. The 32-seat bus departed from an area nicknamed "Little Mogadishu" for the amount of Somali immigrants and Kenyans of Somali origin that live in the area.
"We have one suspect who was arrested soon after the incident. He is assisting us in the investigations," Kibue added.
Authorities are still determing whether it was a grenade or improvied explosion device (IED) that caused the bus to explode. They are also still uncertain of if it was placed inside the bus beforehand or if it was thrown. According to witnesses, the explosion hit other cars around the bus and resulted in the death of at least one other driver.
At least 15 people have died in Kenya since Tuesday in a string of attacks, according to Al Jazeera. On Friday, at least one person was killed and three others were injured after explosions hit Wajir, a town near the Somalia border.
Additionally, eight Kenyans were killed on Tuesday -- including five police officers -- in an attack near Somalia. One of the police officers is still missing.
On Thursday, marking 50 years of independence from the U.K., a bus full of British tourists was attacked with a grenade in Mombasa though it did not explode.