Police officers have arrested a man after discovering guns in a vehicle as several men planned to attack an election centre, it has been alleged.
According to local media in the United States, an alleged plan was uncovered leading to the arrest.
Several men had allegedly planned to attack Pennsylvania Convention Centre where votes are being counted.
This comes as Republican candidate Donald Trump delivered a statement on Thursday evening alleging the occurrence of voter fraud in a number of states.
A local journalist, Victoria Brownworth tweeted: "Philly PD have surrounded the Convention Centre after arresting several men who drove up from Virginia with guns to attack those counting votes in #Philly."
She later added votes have continued to be counted and Philadelphia police are patrolling the centre.
Police reportedly received a tip that a group, possibly a family, drove up from Virginia in a Hummer to attack the election centre where votes are being counted that could give Joe Biden a lead in the keystone state, says Mirror Online.
Police say they recovered a weapon and believed they recovered the Hummer they received a tip about.
No injuries have been reported.
The incident occurred shortly after Mr Trump made a public speech.
He said: “If you count the legal votes I easily won. If you count the illegal votes, they can try to steal the election from us.”
Tensions have been rising as Donald Trump and Joe Biden go head to head.
On Wednesday,Trump supporters shouted "stop the vote" after barging into a counting hall in Detroit, according to footage shared online.
As the US election entered its second day and votes continue to be tallied, alleged Trump fans stormed into the site causing chaos.
Pictures and videos from the counting site showed challengers screaming to stop the vote count, reports The Sun.
An NBC news reporter, Steve Patterson, posted a video on Twitter which showed people banging on glass windows and chanting while workers count.