Coimbatore: A day after the CBI detained three customs officials at the Tiruchirapalli airport for alleged connivance with smugglers, the agency yesterday raided a flat belonging to one of them.

A four-member CBI team searched the flat of Customs Superintendent S Ramakrishnan at Kovaipudur for nearly two hours and reportedly recovered some documents, police said.

The central agency had detained three customs officials, including an assistant commissioner at the Tiruchirapalli airport.

The assistant commissioner and two customs superintendents were detained after a crack down in which the CBI found that several passengers, who arrived from Singapore day before yesterday, were cleared by the Customs despite allegedly carrying contraband.

The CBI searches came in the background of regular attempts to smuggle gold, turtles and other items through the Tiruchirapalli airport.