Security measures have been enhanced at the airport Pulkovo following an explosion in a tunnel between Tekhnologichesky Institut and Sennaya Ploshchad stations of the St. Petersburg metro, the airport’s press service said, adding that information about full closure of the airport wasn't confirmed.
"The airport has tightened security measures, including security control at the airport’s entrances and preflight inspections," TASS cited the press service as saying.
