Sky News journalist Alex Rossi was at the airport when the blasts occurred. He said he heard two "very, very loud explosions".
"I could feel the building move. There was also dust and smoke as well... I went towards where the explosion came from and there were people coming out looking very dazed and shocked.
"The thinking here is that it is some kind of terrorist attack - that hasn't been verified by any of the authorities here at the airport."