Patricia Ortega, wife of slain Philippine environment activist Gerry Ortega, poses with a picture of her husband in Palawan's capital Puerto Princesa in 2011
Two Philippine politicians wanted over the murder of a prominent anti-corruption crusader have been arrested in Thailand after more than three years on the run, the president's office said Monday.
Joel Reyes, a former provincial governor, and his brother, Mario, a former town mayor, were detained on the Thai holiday island of Phuket on Sunday, said presidential spokesman Herminio Coloma.
The Reyes brothers are facing murder charges over the 2011 death of Gerry Ortega, a prominent Palawan environment activist who had also used a radio show he hosted to frequently accuse the Reyes brothers of massive graft.
The brothers went missing in early 2012 after an arrest warrant was issued for them and had initially fled to Vietnam and then Thailand, officials said.
"The arrest of the long-wanted Reyes brothers provides an opportunity for pursuing the ends of justice," Coloma said in a statement.
He acknowledged Interpol and the Thai police for their help in arresting the Reyes brothers, but did not provide further details.
Ortega was shot in the head at point-blank range while shopping in the capital of Palawan, one of the Philippines' biggest islands that is known as one of the nation's last environmental frontiers but which has suffered from illegal logging, mining and fishing.
The gunman was caught trying to flee the scene and police said his weapon was owned by one of Joel Reyes's lawyers.
Aside from alleged environmental crimes such as illegal mining, Ortega had accused Joel Reyes of syphoning off millions of dollars in revenues from a gasfield off the coast of Palawan when he was governor.
The brothers' escape reinforced the Philippines' reputation for having a "culture of impunity", with powerful men free to kill or intimidate political opponents, journalists and other critics without any punishment.
At least 169 journalists or media workers have been killed since the restoration of democracy in the Philippines in 1986, but only 13 cases have seen murder convictions, according to the nation's main press union.
Ortega's case is listed as one of the unsolved ones, because one of his jobs was a radio broadcaster.
His widow, Patty Ortega, expressed relief at the arrests but also said she was worried about whether the Reyes brothers could still evade justice.
"We still feel anxiety. Our judicial system is not that fast. We know our opponents have a lot of advantages. They have money, influence. They slipped through immigration. So it is not far from our thoughts that something else might happen," she told AFP.
"I want to see them handcuffed and facing a court and in jail."
Philippines' immigration bureau chief Siegfried Mison said the pair would be flown home soon.
"It is a cut-and-dried case. It should not take more than five days," he told ABS-CBN television.
In Thailand, Lieutenant General Thitiraj Nhongharnpitak , commissioner of the Central Investigation Bureau, said the brothers had lived in the country for two years and had planned to open fitness centres.