United Kingdom has expressed fear that western weapons in Ukraine could end up with terrorists. Graham Biggar, director general of the UK's National Crime Agency, told the Sunday Times that arms sent to Ukraine could be trafficked out and end up in the hands of criminals and terrorists. Biggar said that police in the UK and Europe are watching out for pistols and guns turning up on the streets. Last month, Russian President Vladimir Putin claimed "cross-border criminal groups" had obtained "powerful weapons," including portable air defence systems and precision weapons, from Ukraine. Watch this video to know more.