At 12.20pm Sunday (31/8), a cyclist was travelling down Muswell Hill near Brill when he was in collision with a grey Land Rover Freelander that was travelling in the opposite direction.
The cyclist, a 40-year-old man, was pronounced dead at the scene.
Officers would like to speak to anyone who may have seen the collision.
The cyclist was riding a grey bicycle and was travelling away from Brill at the time of the collision.
If anyone has any information please call PC Alex Dearden quoting URN 753 of 31/8 via the Thames Valley Police 24-hour enquiry line 101.
Warrants executed in Aylesbury today – Update 1
Ten men have now been arrested after a series of warrants were executed in Aylesbury and other Buckinghamshire towns this morning relating to child sexual exploitation.
Around 120 officers executed warrants at 11 properties from 7am. Seven warrants were carried out in Aylesbury, one in Milton Keynes, one in Buckingham, one in Chesham and one in Hayes, Middlesex.
A number of other addresses in Aylesbury were visited and another man was arrested by Immigration authorities on suspicion of an immigration offence.
Aylesbury Vale LPA Commander A/Supt Olly Wright said: “We have now arrested a total of ten men as part of a series of warrants this morning and all of them are currently in police custody.
“I want to thank the community of Aylesbury and the other affected towns for their continued patience this morning and apologise for any inconvenience which may have been caused.
“Child sexual exploitation is an issue which we take extremely seriously and I want to reassure the community that these allegations are being thoroughly investigated.
“If you have been a victim of this type of crime, know anyone who has, or have information, please don’t hesitate to call 101.”
If you don’t want to speak to police you can call Crimestoppers anonymously on 0800 555 111.
If you are worried about somebody who you think may be a victim of child exploitation you can call ChildLine on 0800 11 11 or visit their website www.childline.org.uk
Concerned about a child in Buckinghamshire? Call First Response - Buckinghamshire County Council: 0845 460 0001 or email: cypfirstresponse@buckscc.gov.uk
Bucks has a county-wide service for young people, Barnardo’s ‘R-U-Safe?’ which is able to offer advice and support to any young person worried about these issues. Email: rusafe@barnardos.org.uk Text: 07546 075 638 or visit www.barnardos.org.uk/rusafebucks