ISIS threatens UK with 'harder and more bitter' attack than Brussels

ISIS has threatened to hit the UK 'harder and more bitter' after claiming responsibility for the Brussels bombings.

Britain has ramped up security with armed officers taking to the streets near major landmarks, train stations and airports.

The heightened police presence comes after at least 34 people were killed and many more left injured in a series of bomb attacks inside an airport terminal and Metro station in the Belgian capital.

The explosions come just a day after the Belgium Interior Minister warned of possible revenge attacks after the arrest of Paris massacre suspect Salah Abdeslam in the city last week.

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And through the terrorist group's official Telegram account, a statement read: 'We promise to the states that are allied against the Islamic State that they will face dark days in return for their aggression against our state. 

'And what will await you will become harder and more bitter through the grace of Allah.

'In praise of Allah who has made our blows precise and helped us succeed. we demand for him to accept our brothers among the martyrs.'

A major manhunt is underway for an ISIS suspect in a white coat and black hat who fled Brussels Airport after the two explosions ripped through the terminal in a suicide bomb attack this morning, killing 14 people and injuring dozens of others.

Police issued a wanted notice for the man who was seen on CCTV pushing a luggage trolley through the check-in area with two other suspects minutes before the blasts.

His alleged accomplices were wearing black gloves on their left hands, which security sources say would have hidden the triggers for their explosive vests.

The two men blew themselves up while the third suspect is believed to have left a nail bomb and fled, according to De Standaard.

It is not known if the fugitive then sped to Maelbeek station to carry out the blast that killed 20 people in a subway train just 79 minutes later. (Source)