Police Spokesman Eric Kiraithe said they are compiling data on the two suspects which will be released to the public soon.
“We have been given a clear description of the two suspects and are now piecing together the information. These are the two people who were involved in the attack,” Kiraithe said of the men, one of them said to have left a bag in a shop in the building before the explosion went off, wounding 38 people.
“We are working closely with various other agencies, including from foreign countries. The people you saw at the scene are just part of the teams from outside the country who are working with us. We are looking into calling for more assistance from our friends,” he told a press conference late Tuesday.
He said samples collected from the site had been taken to the Government Chemist for further analysis.
Meanwhile, police have released a photograph of a German or Turkish national who is believed to be actively involved in Al Shabaab activities and who is now hiding in the country.
Kiraithe said police have no reason to believe the suspect is involved in Monday’s blast in Nairobi but they know for sure he was involved in previous attacks blamed on Al Shabaab.
“Emrah Erdogan is believed to have entered Kenya through Garissa from Somalia on May 3 and probably he is still in the country,” the police spokesman said. “Any person with information should provide the same to the nearest police station.”
He said the suspect is believed to be a citizen of either Germany or Turkey and travels on fake papers.
“There are people who have accused us of linking suspects to Al Shabaab, but on this one I can tell you for sure we have every reason to link him to Al Shabaab,” Kiraithe said.
He said “although we have no reason to link him to yesterday’s (Monday) attack, we know he has been involved in any other attacks that have been linked to Al Shabaab and which Al Shabaab themselves have claimed responsibility.”
Kiraithe said no suspect had been arrested over Monday’s blast on Moi Avenue but assured investigators were working round the clock to get the attackers.
Detectives from the Federal Bureau of Investigations (FBI) are working with the Kenya police in their investigations to determine the cause of the blast.
On Tuesday, the detectives spent most of the morning sifting through debris in a bid to establish the kind of explosive used.
Police sources told Capital FM News the investigators had detected the use of a fertilizer bomb in the attack.
The detectives had sent samples collected from the scene to the government chemist for further analysis.