The Begumpet airport in the city on Wednesday received a bomb threat via email, which turned out to be a hoax, police said.
The airport authorities received the email on Wednesday morning, and thorough checks were conducted at the premises by the bomb disposal squad and other security wings.
Fire service was also deployed during the checks, police said, adding that the bomb threat was found to be a hoax.
Further investigation was underway.
The airport at Begumpet in the heart of the city is not used for passenger services, and only VIP aircraft are operated from the facility.
Meanwhile, a bomb threat mail targeting a Qatar Airways cargo flight was received at the RGI airport on city outskirts on Wednesday, which was found to be hoax after thorough checks.
The email claimed the presence of a human bomb in the cargo flight and the threat turned out to be a hoax, police said.
The mail was sent to the customer care id of the airport in the morning and all procedures were followed as per the Standard Operating Procedures (SOP), airport sources said.
As per the SOP, an emergency was declared in the airport, fire and security teams were put on standby till the aircraft landed safely and a temporary bomb threat assessment committee (comprising representatives of airport security, police and others) was also formed.
The aircraft landed safely and it was taken to an isolation bay and thorough checks were carried out, they said.