Yes, you should tell them all of all accidents, violations or claims regardless of location or scope.
Many car insurance policies require the policyholder to notify them of any accidents.
So the terms of your policy may require you to notify your insurance company of any accidents you are involved in, including those that may have occurred out of the country. Legally, you are require to answer all the quesitons in their insurance contract truthfully before you sign your name to the document.
If this accident abroad or your current driving record causes your car insurance premiums to increase you can shop with us for low cost car insurance.