A group of Egyptian Bedouin has attacked police at a border crossing between Egypt and Israel.
A civilian and a police officer were injured in the clash with Bedouin
An Egyptian policeman and a customs official were injured in the clash during which attackers fired rocket propelled grenades, police said.
At least one car was set on fire at Aouja crossing and traffic was briefly prevented from entering Israel.
The Bedouin were protesting about the recent arrest of two of their men who had been involved in a tribal dispute.
Egypt's Bedouin complain regularly about what they say is discriminatory and heavy-handed treatment by the authorities.
The Egyptian government has accused elements within the Bedouin community of links with militants involved in bomb attacks.