India, Feb. 10 -- A letter written threatening bomb blast was found at the Sardar Patel International Airport of Gujarat's Ahmedabad, police said on Monday.

"A letter written by an unknown person was found at Sardar Patel International Airport, Ahmedabad threatening to blow up the airport," news agency ANI quoted Sharad Singhal, JCP Ahmedabad Crime Branch, as saying

This is latest in the series of similar bomb threats via letters and emails across establishments in the country, that have turned out to be hoax so far. On February 7, prominent college and two schools in Delhi-NCR received bomb threats over email, prompting police to deploy explosive disposal units and dog squads to comb the premises, officials said.

The threat emails wer...