Airports across India are on high alert after officials say they received a warning of possible attacks using hijacked planes.
The BBC initially quoted an incorrect claim from an airport worker that six people had been shot and killed at Indira Gandhi International Airport.
But Indian authorities have since denied that there was any shooting.
Airline passengers are said to have panicked and mistakenly reported that shots were being fired after two loud noises were heard.
Tensions have been high in India since last week's shooting spree in Mumbai left nearly 200 people dead.
A threat of more attacks has been made by the Deccan Mujahideen, a previously unknown militant group which claimed responsibility for the Mumbai attacks.