Sharia in action.

(Reuters) — A couple were stoned to death for adultery in a remote area of Pakistan’s western Baluchistan province, an official said Monday, leading to six men being held on suspicion of murder.

The couple, both married to other people, were believed to be in their 30s, said Sarfaraz Bugti, the home minister for Baluchistan.

The woman’s father and brother, and the man’s uncle and father have been arrested, along with a cleric believed to have issued the order to kill them at the weekend. Another man linked to the cleric is also being held.

In many rural areas of Pakistan, gatherings of tribal elders, often referred to as jirgas, issue death sentences for couples or women deemed to have offended the conservative culture. Such killings are illegal in Pakistan, but the police force is weak and often ignores them.

Even if the cases are brought to court, they can take years to be heard and the national conviction rate hovers between 5 to 10 percent. If convicted, the victim’s family can forgive the killers – a major loophole, since the killers often are the victim’s family.

Women’s rights group The Aurat Foundation says it tracks around 1000 cases of honor killings per year just from media reports. The true figure is probably much higher.

In one high profile case that captivated the country, five women were allegedly killed in 2012 in remote Kohistan after they were videotaped singing and clapping softly to music with two men present.