SAN FRANCISCO (AP) — Two brothers who were attacked by an escaped tiger at the San Francisco Zoo have filed claims against the city alleging negligence and defamation.

Kulbir and Amritpal "Paul" Dhaliwal are seeking monetary compensation for "serious physical and emotional injuries." The claims filed this week are a prerequisite for filing a civil lawsuit.

The pair were injured on Christmas Day after a 250-pound Siberian tiger scaled the walls of its enclosure, attacked them and killed their friend, 17-year-old Carlos Sousa Jr. The animal eventually was shot dead by police.

The walls of the outdoor enclosure later were found to be lower than recommended by an accrediting agency for the nation's zoos.

The documents allege the city failed in its duty to provide a safe zoo environment, defamed the brothers by spreading falsehoods about their possible role in provoking the attack and improperly impounded Kulbir Dhaliwal's car.