<p>Thoothukudi (Tamil Nadu): Security has been beefed up at the airport here following an alleged bomb threat issued through e-mail, police said on Thursday.</p><p>The airport security and police restored to thoroughly frisk the passengers in the wake of the threat.</p>.Mumbai school receives bomb threat on mail; explosive detection personnel on site .<p>Sniffer dogs were brought to detect any suspicious objects. An investigation was on, the official said.</p>
<p>Thoothukudi (Tamil Nadu): Security has been beefed up at the airport here following an alleged bomb threat issued through e-mail, police said on Thursday.</p><p>The airport security and police restored to thoroughly frisk the passengers in the wake of the threat.</p>.Mumbai school receives bomb threat on mail; explosive detection personnel on site .<p>Sniffer dogs were brought to detect any suspicious objects. An investigation was on, the official said.</p>