Masked and armed al-Shabab fighters - file photo
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US security chief warns shoppers after terror threat

The head of US homeland security has warned Americans to be vigilant after a terror threat to major shopping centres.

Jeh Johnson said he took the threat by the Somalia-based, al Qaeda-affiliated group al-Shabab seriously.

In a video, the group urged followers to carry out attacks on shopping centres in the US, Canada and the UK.

Naomi Grimley reports from Washington.

  • 22 Feb 2015
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