Belgian soldiers patrol in central BrusselsImage copyright Reuters
Image caption The alert comes as Belgian authorities say the capital Brussels will remain on its highest terror alert level for one more week

The US has issued a worldwide travel alert for its citizens in response to “improved terrorist threats”.

The state department stated “present info” recommended the Islamic State [IS] group, al-Qaeda, Boko Haram and other individuals continued “to plan terrorist attacks in multiple regions”.

The alert, it mentioned, will stay in location till 24 February 2016.

France, Russia, Mali and a number of other nations have seen deadly attacks in the past month.

A US state department representative told BBC News there was “at the moment… no explanation to believe that US citizens would be particularly targeted”.

Meanwhile Belgium announced the capital Brussels would keep at the highest level of alert for an additional week over fears of militant attacks like those that killed 130 men and women in Paris on 13 November.

In other developments

  • An apparent explosives belt was identified in a bin in the Paris suburb of Montrouge, which a fugitive suspect is believed to have passed through on the evening of the Paris attacks
  • France carried out its very first air strikes against IS from its Charles de Gaulle aircraft carrier, newly deployed in the eastern Mediterranean, reportedly hitting targets in Iraq and Syria, which includes the IS stronghold of Raqqa

The travel alert advises US citizens to “exercise vigilance when in public places or utilizing transportation”.

They are also advised to “be aware of immediate surroundings and stay away from big crowds or crowded places”.

“Authorities think the likelihood of terror attacks will continue as members of ISIL/Da’esh [IS] return from Syria and Iraq,” the state division mentioned.

America final issued a worldwide travel alert in December of final year, in response to an attack in Sydney, Australia, when it warned of the danger of “lone wolf” attacks.

What the alert implies for Americans

Asked by BBC News to clarify the alert, a state division representative produced the following points

  • Such alerts are issued to inform US citizens of the present threat level and remind travellers to be specially vigilant in the course of the holiday season and at sites frequented by vacationers
  • This travel alert is becoming issued to alert US citizens to multiple attacks this past year, such as in France, Denmark, Turkey, and Mali, and an IS claim of duty for the bombing of a Russian airliner in Egypt
  • Preceding worldwide travel alerts had been issued in May 2011, September 2011, August 2013 and December 2014

Belgian Prime Minister Charles Michel warned that the threat to his country remained “imminent and significant”.

But he also said authorities have been organizing to reopen schools and the Brussels metro on Wednesday.

IS is believed to be behind the 13 November Paris attacks.

Co-ordinated assaults employing guns and suicide vests were launched on numerous locations in the French capital.

Belgian prosecutors announced on Monday that a fourth suspect had been charged with terrorism offences related to the Paris attacks.

The unnamed man was one of 21 folks detained in raids on Sunday and Monday. Seventeen have been released with out charge.

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