A Pakistani and a Saudi were killed on Monday when the Saudi Arabian border region came under renewed bombardment from Yemen, official media reported.

The Pakistani's killing was a rare death of a foreigner during weeks of war the United Nations says have killed more than 1,400 people in Yemen.

An Apache helicopter gunship from the Saudi-led coalition fighting Yemeni rebels made an emergency landing Thursday just inside the border from Yemen, a Saudi official said, ruling out hostile fire.

"The pilots are safe," but there was some damage, said the source, asking for anonymity.

Shells fired from Yemen killed five people in Saudi Arabia on Wednesday in a second day of cross-border bombing blamed on Shiite Huthi rebels, civil defense authorities said.

Two civilians in a car and two passers-by were killed by a shell in the city of Najran, while 11 others were wounded, the civil defense department said in a statement carried by the SPA state news agency.

A Saudi convicted of murder was beheaded on Tuesday, the interior ministry announced, raising to 40 the number of people executed in the conservative Muslim kingdom this year.

Maneh al-Daen was found guilty of stabbing to death a fellow tribesman, Nasher al-Daen, the ministry said in a statement carried by the official SPA news agency.