Saudi authorities executed a Pakistani man on Sunday for attempting to smuggle drugs into the ultra-conservative kingdom, the interior ministry said.

Up to 129 people have been executed in Saudi Arabia so far this year, including the latest execution, compared with 87 for the whole of 2014, according to AFP tallies.

Warplanes from the Saudi-led coalition hit Yemen rebel positions Saturday as reinforcements reached pro-government forces preparing for an anticipated advance towards the capital, military sources said.

Apache helicopters struck a base occupied by rebel forces near Bayhan, in the southern province of Shabwa, hours after fighter jets targeted a convoy of the Iran-backed Huthi rebels in the area, a military source said.

Saudi Arabia on Thursday executed a Pakistani man convicted of smuggling drugs into the ultra-conservative kingdom, the interior ministry said.

It brought to 128 the number of executions so far this year in Saudi Arabia, compared with 87 for the whole of 2014, according to AFP tallies compiled from interior ministry statements.

Saudi Ambassador to Lebanon Ali Awadh Asiri has said that the recent travel warning issued for Lebanon came out of Riyadh's keenness on the safety of its citizens.

Asiri told pan-Arab daily al-Hayat published on Thursday that Saudi Arabia fears its citizens could be harmed in the latest events that shook the country.

Saudi King Salman will visit the United States next month for the first time since acceding the throne and following a rift over America's rapprochement with Iran, a diplomat said Wednesday.

The monarch, who pulled out of a Gulf leaders' summit with U.S. President Barack Obama in May at the last minute, would travel to Washington on September 4, the Saudi diplomat said.

A key suspect in the bombing of a housing complex in Saudi Arabia that killed 19 U.S. airmen almost two decades ago has been captured, a newspaper reported Wednesday.

Ahmad Ibrahim al-Mughassil, who is wanted by the U.S. Federal Bureau of Investigation, is said to be the head of the Saudi Hezbollah's military wing, an outlawed organization whose members are drawn from the kingdom's Shiite Muslim community.

Saudi Arabia Wednesday executed three of its citizens for murder and a Syrian convicted of drugs smuggling, a day after Amnesty International urged a moratorium on rising executions in the conservative kingdom.

The executions brought to 127 the number this year in Saudi Arabia, compared with 87 in 2014, according to AFP tallies compiled from interior ministry statements.

At least 40 people have been killed in more than 24 hours of Saudi-led coalition air strikes and fighting in Yemen's central province of Baida, military sources said on Tuesday.

The fighting and air raids in Mukayris, a town seen as a gateway to southern provinces recently recaptured by pro-government forces, left 19 rebels, 15 loyalists and six civilians dead, the sources told AFP.

Three Saudi soldiers have been killed by artillery fire from Yemen, and another died when his patrol vehicle crashed along the border, authorities in Riyadh said on Tuesday.

A Saudi border post in the kingdom's southern region of Jazan came under shell and rocket fire from Yemeni territory on Monday.

Amnesty International on Tuesday denounced Saudi Arabia's "deeply flawed judicial system" as it issued a new report on the rising number of executions in the kingdom.

In "Killing in the Name of Justice: The Death Penalty in Saudi Arabia", the London-based group criticised trials it said "blatantly flout international standards".