CHENNAI: Following an anonymous bomb threat call, police conducted a check at Chief Minister M. Karunanidhi's residence on Friday. Sniffer dogs were pressed into service. However, the police found the threat a hoax.
Meanwhile, a Sri Lankan refugee was picked up by the police on Friday after he was found wandering around Anna Arivalayam.
According to the police, Kannan (23) came to Arivalayam to seek some financial help.
The person was being questioned by the `Q' branch, the police said.