Hoax threat calls that bombs were planted at the Ranga Reddy district collectorate at Lakdikapul in the city kept the city police on tenterhooks on Saturday.
An abandoned lunch-box created a scare at the Hyderabad Public School in Begumpet and a parked car at Rajiv Gandhi International Airport (RGIA) also sent the security forces to tizzy.
Around 12.30 pm the mischievous caller called up the Police Control Room (PCR) and said that they planted high-intensity bombs on the premises of the Ranga Reddy district collectorate and they would go off any time.
Bomb disposal squads and sinffer dogs made a through search of every nook and corner of the premises but found no explosive material, assistant commissioner of police (Saifabad) KV Ramanarasimha Reddy said. Police are trying to trace the caller who made the calls from mobile and landline phones.
Meanwhile, an abandoned lunch-created scare at the Hyderabad Public School.
A bomb disposal squad, which rushed to the spot, found rice, vermicelli and kumkum inside it, said Begumpet inspector Y Narasimha Reddy.Tension gripped passengers at the Shamshabad airport with rumours spreading that explosive materials were kept inside a car that was parked at the place.
Central Industrial Security Force (CISF) teams rushed to the spot and conducted a search. They found two bags in the car but they contained no explosive material.