Air accident investigators have started searching a helicopter crash which is believed to have killed former rally champion Colin McRae and three others.
Police confirmed that they believed rally champion Colin McRae was killed with his son in a helicopter crash.
The helicopter which belonged to Mr McRae crashed near his home in Lanarkshire on Saturday.
Strathclyde Police released the names of the four people they thought were on board the crashed aircraft on Saturday.
About 40 firefighters attended the accident which happened in woods just north of Lanark at 1600 BST.
Mr McRae, 39, his son Johnny, 5, his friend Ben Porcelli, 6, and family friend Graeme Duncan, 37, were all thought to be on board.
Strathclyde Police said it was unlikely that formal identification of the bodies would be completed on Sunday.
A post mortem will be carried out with a formal identification within the next few days.
However, officers confirmed that they believed that Mr McRae was among those on board.
Users of the rally champion's official website www.colinmcrae.com were greeted by a black screen on Sunday with no information available.
After it disappeared I saw smoke rising from the trees and phoned the emergency services Eyewitness David Lowry
Police have been at the scene throughout the night and a cordon has been thrown around the area, including a private road up to the McRae family home.
Mr McRae, 39, who is married with two young children, was Britain's first rally world champion in 1995 and is the son of five times British rallying champion Jimmy McRae.
Speaking in the Scotland on Sunday newspaper, David Lowry, 48, who owns New Steadings Farm, near Mr McRae's home, witnessed the crash.
He said: "I was speaking to one of my friends on the farm. The helicopter came overhead and then dropped into the valley.
Wider fame
"After it disappeared I saw smoke rising from the trees and phoned the emergency services.
"I could not see what happened when it went down. It did not seem to be in any trouble. It was about half a mile from me and the helicopter seemed to be flying normally.
"It was navy blue in colour and I am led to believe it belongs to Colin McRae. It is up so often my cattle don't even flinch when it is overhead."
He added: "I know him well enough to say hello to, although I don't know him personally. If it turns out to be him it will have an unbelievable effect on the local community.
There were no survivors of the crash on the outskirts of Lanark
"Colin is a very popular person around here. We only moved here seven years ago, but they are a Lanark family born and bred."
Mr McRae is said to be a great practical joker and admitted to enjoying the adrenaline rush of activities such as bungee jumping.
He moved to the principality of Monaco in 1995, partly through his friendship with David Coulthard.
But as his family grew up, he spent more time back at his home in Lanarkshire. He and his wife Alison bought the 17th century Jerviswood House.
His brother, Alister, is also a professional rally driver and has enjoyed some success, including winning the British Rally Championship in 1995.
Mr McRae's sister is a doctor at the University Hospital in County Durham and she too enjoys rally driving.
He also achieved wider fame by endorsing a range of successful video games. Codemasters released the first Colin McRae Rally title in 1998.
Colin McRae: DiRT was the title for the latest installment of the games series which launched this year on PC, Xbox 360 and PlayStation 3.
