Kenya has been left in shock after the killing of a senior lawyer in a drive-by shooting on a busy street in the capital Nairobi.

Mathew Kyalo Mbobu, a respected lawyer and former head of a political parties' dispute tribunal, was driving home on Tuesday evening when a gunman on a motorcycle pulled alongside his vehicle and opened fire. Witnesses on the Lang'ata/Magadi road reported hearing multiple gunshots.

The motive for the attack, which resembles the shocking killing of a lawmaker earlier this year, is unknown. Investigations are under way.

The Law Society of Kenya has described the killing as abhorrent and said the crime must be dealt with swiftly and conclusively.

It expressed concern over threats faced by lawyers, adding that the killing had all markings of a predetermined assassination. LSK president Faith Odhiambo stated that advocates have often been victimized for the work they do.

A gruesome video shared online shows a car's shattered window with the bloodied, lifeless body of the lawyer slouched over the steering wheel.

Senate Speaker Amason Kingi remarked that the cold-blooded killing of Mr. Mbobu has left the community in deep shock and urged police to carry out thorough investigations to uncover the reasons and culprits behind this heinous crime.

In April, Charles Ong'ondo Were, a member of parliament, was shot dead under similar circumstances in a busy road in the capital, prompting police investigations that resulted in several arrests and charges against some suspects.