A newly formed militant group has claimed responsibility a bomb attack targeting a police checkpoint in Cairo's twin city of Giza that wounded six people.

In a statement posted late Friday on a jihadi website, Ajnad Misr, Arabic for Egypt's Soldiers, said its "soldiers reached the heart of the criminal apparatus ... to send a message to them that they are not safe from retribution."

The two homemade bombs hit a police vehicle on a bridge earlier Friday.

The group issued its first statement last week, claiming responsibility for several such bombings.

It vowed to continue its attacks on policemen, urging them to defect and repent.

The authenticity of the statement could not be verified, but it was posted on an al-Qaida-affiliated website frequently used for militant claims.