Israeli startup Gambit Security has held Iranian hackers responsible for a disruptive computer breach that forced Los Angeles' transit system to shut down parts of its network in March, reported news agency Reuters.

Tel Aviv firm Gambit Security says Iranian hackers exfiltrated 700GB of LA Metro data in March and traces the server to a known Tehran-linked operation.

Iranian hackers were responsible for a computer breach in March that forced Los Angeles' transit system to shut down parts of its network, Israeli researchers say.