Lebanese authorities are investigating the killing of a retired customs officer in what a leading politician described as a "terrible incident."
Colonel Munir Abu Rjeili was found dead in his home on Wednesday in Qartaba, some 40 km (25 miles) northeast of Beirut, with a blow to the head, a security source said.
Leading Druze politician Walid Jumblatt asked on Twitter on Thursday what was behind the killing. He questioned whether there was a link with the August 4 explosion at Beirut port that killed about 200 people and devastated swathes of the capital.
"Is this terrible incident to obstruct any serious investigation into the case of the explosion at Beirut port?" Jumblatt wrote.
But a senior interior ministry source said: "So far, no link has been found between the port and the murder."
Abu Rjeili's career in Lebanese customs included leading a Beirut division that counters overland smuggling, serving at the airport and heading a division of the Higher Customs Council, according to CV sent by a relative and lawyer, Joseph Khalil.
Abu Rjeili had not been summoned for questioning in the investigation in to the Beirut blast probe and had not served at the port, the source said.
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Khalil, the lawyer, said the family was waiting for the results of the investigation.
Four months since the explosion, Lebanese are still awaiting the final results of the investigation, after authorities promised a full and swift probe.
President Michel Aoun last month called for the acceleration of the investigation.
The first warning about the cargo that blew up in Beirut port came in 2014 from another late Lebanese customs officer, Colonel Joseph Skaf. Skaf's family believe his death in 2017 was murder, possibly connected to his long career as a customs officer fighting criminality and drug smuggling.