Vin Diesel has paid a moving tribute to his "brother" Paul Walker.

The actor, who co-starred alongside Paul in five Fast And Furious films, posted pictures of the pair together on his Facebook page along with a quote from Thomas Campbell.

"To live in the hearts we leave behind, is not to die," he wrote, quoting the poem.

The 46-year-old added: "Pablo, I wish you could see the world right now... and the profound impact, your full life has had on it, on Us... on me...

"I will always love you Brian, as the brother you were... on and off screen," he added, referring to Paul's Fast And Furious character Brian O'Conner.

Vin, who joins his Fast And Furious co-stars in paying tribute to the actor, previously expressed his grief on Twitter after news of Paul's death broke, writing: "Brother, I will miss you very much. Heaven has gained a new angel. Rest in peace xxx."

The actor, whose real name is Mark Sinclair, thanked fans as he visited the memorial at the crash site in Santa Clarita, California, which is covered with flowers and memorabilia.

"The love that you've shown Paul... it's going to stay with me forever. I just want to say thank you for coming down here and showing the angel in heaven how much you appreciate him," he said on Instagram.

Fast And Furious 6 co-star Luke Evans also paid tribute to Paul.

Speaking at the world premiere of The Hobbit: The Desolation of Smaug in Los Angeles, Luke said: "It's a sad, sad story and I'm still coming to terms with it myself, I am just trying to remember all the great memories of working with him and how lovely he actually he was."

He added: "He was a very warm and humble human being and he was loved by a lot of people and he will be missed by a huge amount of people."

Paul and his friend and fellow car enthusiast Roger Rodas died on Saturday (November 30) when the 2005 Porsche Carrera GT they were travelling in smashed into a lamppost and a tree.

The neighbourhood where they died is known to attract street racers, but law enforcement officials do not believe they had been racing another car.

Accident investigators "have received eyewitness statements that the car involved was travelling alone at a high rate of speed," the Los Angeles County Sheriff's Department said in a statement. "No eyewitness has contacted the (department) to say there was a second vehicle."