Within the past hour, several tweets featuring the #LondonAttack hashtag have shown up on Twitter, including one warning Muslims to leave the area of Covent Gardens:

https://twitter.com/nick1995whufc/status/597748979246465024

"@71LastTweep: Brothers n Sisters if you are in europe stay away from police stations or goverment buildings..#QaribanQariba" @fbi @DHSgov — I_was_Me_Once (@StayingInUSA) May 11, 2015

After that account was suspended, the user apparently began tweeting under a new account:

Others seem to show an explosive device and weapons:

Among others:

Over the weekend, there were fake Twitter threats from Islamic State supporters targeting two international flights that were subsequently diverted.

But, as was widely reported, one of the would-be jihadists targeting the Texas “Draw Muhammad” event posted a tweet on his account featuring the #texasattack hashtag just minutes before the two terrorists were killed in a gunfight outside the event. These users are clearly trying to mimic that.

Just to qualify, we cannot vouch for the veracity of these tweets or their threats.

UPDATE: The user who apparently made the initial threat posted a screenshot of this article: