Tyler Robinson, the accused killer of right-wing activist Charlie Kirk, may have been "aided and abetted" by an "extended network," the FBI suggested on Monday.The agency pointed to "multiple warning signs" leading up to the fatal attack, The NY Post reported.

Charlie Kirk was shot dead during an event at Utah Valley University on Wednesday. The suspected shooter, Tyler Robinson, was arrested a day later.

FBI Deputy Director Dan Bongino told Fox News that investigators are examining whether the assassination was "part of a larger effort," including possible financial support or knowledge of the plot by others who failed to report it.

"We'll also be dropping a lot of paper, a lot of subpoenas out there, to take a look to see if there was any extended network," he said.

"There appear to have been multiple warning signs about Robinson going off the deep end," Mr Bongino said. "There were people in his network, friends and family who had stated that he had become more political."

Authorities are probing online communities linked to Tyler Robinson, including pro-trans groups, animal-obsessed "furries," and gaming communities on Steam. 

Source:Ndtv