Picture used for illustrative purpose. File

Eight members of the same family were gunned down in an attack on a mosque in eastern Afghanistan, officials said Sunday.

The shooting happened on Saturday night in the city of Jalalabad in Nangarhar province, and was believed to be over a land dispute, the province's governor Zaiulhaq Amarkhil said.

Five brothers and three of their male cousins were killed.

"The incident is under investigation but initial information shows a land dispute has caused the incident," Amarkhil said.

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Fareed Khan, a spokesman for Nangarhar police, confirmed the attack.

Revenge killings are common in Afghanistan, where families seek justice by carrying out violent acts of vengeance based on an ancient code of honour.

So-called blood feuds can last for decades, passing down through generations in a cycle of violence.

Agence France-Presse