The State headquarters of the DMK, the main opposition in Tamil Nadu, here received a hoax bomb call on Thursday, police said.
Following the call, the premises of the headquarters, "Anna Arivalayam," was thoroughly checked by police.
"It is no doubt a hoax call," a police officer told PTI.
Sniffer dogs were also used and nothing suspicious was found, he said, adding the identity of the caller was being established.
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