PUDUCHERRY: Coastal security drill Operation Hamla concluded here on Thursday evening.
Sources said efforts of the Red forces to infiltrate into the UT were thwarted by alert Blue forces along the coastal areas of Puducherry, Cuddalore and Villupuram.
According to sources there were two phone calls from unknown persons that bombs had been planted in the Pondicherry University and Bharathiar Palkalaikoodam.
The areas were cordoned off and searches yielded no results. The calls proved to be hoax, the sources added.