"There are nine suspects in custody who are held under the counter-terrorism laws. As soon as investigations are complete, we will update you with identities of the suspects," Kenyan Cabinet Secretary for Interior Joseph Ole Lenku stating during a press conference here.
"More suspects continue to be arrested including one arrested on Sunday," he added.
The East African country's security forces are working round the clock to unearth details that might lead to the arrest of more terror suspects.
So far ten people have been arrested for the Westgate mall attack
"Investigations into the Westgate shopping mall terror attack continue. So far, police have recorded statements from 156 witnesses," said the official, adding that forensic investigators have identified one of the vehicles used by terrorists.
"Investigators have recovered crucial items in the vehicle and they are providing good and credible leads. Some of the items found in the vehicle include an assortment of illegal weapons," Lenku said.
According to the official sources, gunmen killed at least 61 civilians and six security agents, who also shot dead five attackers. As many as 175 people were wounded in the four-day siege on the mall.