* British police say believe dead body is Boumeester
* Body found with gunshot wounds
* Boumeester's car found nearby
* CFO's family assumes "tragic ending"
(Rewrites with British police comment)
AMSTERDAM, June 29 (Reuters) - British police said on Monday they believed they had found the body of Huibert Boumeester, former chief financial officer of Dutch bank ABN AMRO, who went missing a week ago with two of his guns.
Britain's Thames Valley Police said they had found a man's body in Windsor, to the west of London, on Sunday. He had apparently died of gunshot wounds.
"Although a formal identification has not yet taken place, police believe the body is that of missing Huibert Gerard Boumeester, aged 49," Thames Valley Police said on its Web site.
A vehicle matching the description of Boumeester's vehicle was found near the scene, in Winkfield, about 48 kilometres (30 miles) west of London, the police said.
The former ABN AMRO CFO, a Dutch national who was also previously CEO of ABN AMRO Asset Management, apparently killed himself, Britain's Daily Mail newspaper reported, citing unnamed sources.
"We are deeply shocked by what we can assume has been a tragic ending," Dutch communications agency Maas De Vries said in an emailed statement on behalf of Boumeester's family.
An ABN spokeswoman told Reuters the bank had no information on Boumeester's reported death, but that its thoughts were with his family.
No one at Royal Bank of Scotland, which led a consortium that acquired ABN in 2007, was available to comment. (Reporting by Ben Berkowitz and Gilbert Kreijger; Editing by Will Waterman)