By Andrew Mills, Parisa Hafezi and Alexander Cornwell DOHA/ISTANBUL/TEL AVIV (Reuters) -Explosions were heard over Qatar's capital Doha on Monday, a Reuters witness reported, shortly after a Western diplomat said there had been a credible Iranian threat against the U.

The US embassy in Qatar has also lifted its shelter-in-place order and said operations will resume as normal on Tuesday.

Qatar Airways flight bound for Doha cancelled after the country closed its airspace in anticipation of retaliatory attacks by Iran.