The call was later declared as "non-specific" by the Bomb Threat Assessment Committee (BTAC), airport sources said.
Flight operations during this period were unaffected, they said.
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The BTAC was formed to assess the threat, they said, adding, security agencies carried out an extensive screening of the people at the airport.
The BTAC declared the call as "non-specific" at around 3.30 a.m, the sources said.
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