At least one person reported dead and 28 others injured after blast strikes building in Nairobi's commercial district.
Last Modified: 28 May 2012 14:14
confusion over whether the explosion was caused by a bomb or electrical fault.
Police Commissioner Mathew Iteere told reporters on Monday it was too early to determine the cause of the blast.
He said blackened wires inside the trading centre indicated a possible electrical fault and ruled out a grenade attack.
Two shopkeepers however, told the Reuters news agencies independently that they saw a man drop a bag inside the trading centre moments before the blast.
"He came into the shop twice, looking at t-shirts. He said he didn't have money so he left. Then he came back," said Irene Wachira.
"(He was) three shops away from where I was. He left a bag and a few moments later we had an explosion. The roof caved in and debris started falling on us," Wachira said.
Television pictures on Monday showed a fire raging in a badly damaged building in Nairobi's commercial district.
There has been a string of attacks in Nairobi and the port city of Mombasa blamed on Somali anti-government fighters and their sympathisers since Kenya sent troops into Somalia in October.