Rivira editor Upali Tennakoon and his wife were lucky to survive the attack in January 2009 outside the capital Colombo as they drove to work.

It was the latest in a string of violent attacks against journalists in Sri Lanka, and came two weeks after Wickrematunge was ambushed and stabbed to death as he drove to his office.

Prosecutors told a magistrate that the two suspects, military intelligence officers Prema Ananda Udulagama and Rajapaksage Lalith Rajapakse, used sharp and blunt instruments to assault the Thennakoons.

"The officers were attached to the Tripoli Military Intelligence platoon of the Sri Lanka army," Attorney-General's department spokeswoman Nishara Jayaratne said.

Investigators have said that Wickrematunge was assassinated by members of the same military intelligence unit.

But a decade after his death, no-one has been indicted over the incident, which sparked international outrage.

Wickrematunge, a prominent critic of the former administration, was stabbed days before he was due to testify in a corruption case involving the then-defence ministry secretary Gotabhaya Rajapakse.

The killing shone a light on human rights violations in Sri Lanka under former president Mahinda Rajapakse, Gotabhaya's brother.

Wickrematunge had accused the former defence secretary of taking kickbacks in arms procurements, including the purchase of second-hand MiG jet fighters.

Rajapakse has been accused of giving orders to a shadowy military outfit allegedly involved in murdering journalists and political dissidents during Sri Lanka's long-running civil war to carry out hits, an allegation he denies.

He is expected to contest the presidential elections due later this year.