A court run by Yemen's Houthi rebels on Tuesday sentenced 30 academics, trade unionists and preachers to death for allegedly spying for the Saudi-led coalition, a judicial source said.

A Canadian man sentenced to death in China for drug smuggling will appeal the verdict, his lawyer said on Tuesday, arguing that the court should not have increased his sentence given no new evidence had been introduced during his retrial.

A Doha Criminal Court has sentenced two Asian men to death for the premeditated murder of their employer, and a third man to six months in jail for being aware of the crime and not reporting it.

A military court in the Hamas-run Gaza Strip on Monday sentenced six people, including a woman, to death for "collaborating" with Israel, authorities said.

Tun Hung Seong was arrested in April last year after a tipoff that he had hired a man to smuggle nearly 300 kilogrammes of crystal meth.

Bangladesh on Monday promised to introduce the death penalty for deliberate road deaths in a bid to quell more than a week of demonstrations calling for better road safety, as new student-led protests were met with tear gas and rubber bullets.

A Kenyan court has sentenced a 24-year-old beauty queen to death for murdering her boyfriend by stabbing him 25 times, drawing criticism from rights groups who called the punishment "inhumane".

The ruling comes as Indonesia struggles to rein in a rising tide of homegrown militancy, inspired in part by the extremist group Islamic State.

Sirul Azhar Umar was arrested and has been held in an Australian immigration detention centre since January 2015.

China has commuted the death sentence of former tycoon Wu Ying to 25 years imprisonment, state media said Saturday.

Florida executed a man convicted of the 1993 rape and murder of a college student, while Alabama halted its planned execution of a convicted murderer.

Ten other women of various nationalities were sentenced to life in prison, he said. All the verdicts can be appealed.