The insider said that several members of the cast and crew, who were supposed to fly to Atlanta this weekend to resume filming on Tuesday, said they won't be returning to the set anytime soon as they are "too distraught" to work and expect the production will be halted.
Universal Studios, the company behind the film series, has yet to comment but sources said that this week's scenes all focused around Paul so the script will require some major rewrites.
Paul's co-stars Dwayne 'The Rock' Johnson and Vin Diesel paid tribute to the late actor shortly after news of his death broke.
Dwayne tweeted: "All my strength, love & faith to the Walker family during this heart-breaking time. We find our strength.. in his light. Love you brother."
Meanwhile, Vin Diesel posted on Instagram: "Brother I will miss you very much. I am absolutely speechless. Heaven has gained a new Angel. Rest in Peace."
- Bang! Showbiz