Safety advocates say it could have been a lot worse if the blast had released a cloud of hydrogen fluoride, a deadly chemical used in the refining process.

Jeremy Hunt and Boris Johnson both say they are the candidate who will finalize a Brexit deal.

The shooting was one of several across the city overnight, with eight people shot – two of whom died – in about a two-hour span.

Authorities say four Chinese nationals involved in the construction have been detained while an investigation is carried out.