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London terror attack spurs online #PrayforLondon effort

Sean Rossman, USA TODAY

People leave after being evacuated from the Houses of Parliament in central London.

The London terror attack has sparked an online movement of solidarity with the English city — again the target of terrorism.

Using #PrayforLondon, tweeters, Facebook users and Instagrammers are paying tribute to those killed and injured in the attacks with well wishes and calls for strength and prayer.

#PrayforLondon

Follow Sean Rossman on Twitter: @SeanRossman