A top adviser to President Trump says he does not believe it is a coincidence that Monday evening's explosion at an Ariana Grande concert in Manchester, England, occurred exactly four years after a British army soldier was killed by Islamic extremists in London.

"Manchester explosion happens on 4th anniversary of the public murder of Fusilier Lee Rigby. Dates matter to Jihadi terrorists," Sebastian Gorka, a deputy assistant to the president, tweeted.

NOTE: Manchester explosion happens on 4th anniversary of the public murder of Fusilier Lee Rigby.



Dates matter to Jihadi terrorists. pic.twitter.com/dRhyaWN9AV — Sebastian Gorka DrG (@SebGorka) May 23, 2017



British Army soldier Fusilier Lee Rigby was brutally murdered by two Muslim extremists on May 22, 2013. Rigby died after Michael Adebolajo and Michael Adebowale sought to behead him. The two ran over him with their car before hacking him to death with knives and a cleaver.

Rigby was a Manchester native, growing up just 3 miles from the arena where the deadly explosion took place.

While U.K. police have not officially labeled the incident an act of terrorism, they are treating the incident as such until they learn other wise. According to reports, U.K. law enforcement and American officials briefed on the situation say a suicide bomber is responsible for the attack that killed 19 and injured at least 50 but neither are confirming those details at this point.