Kanye West has reportedly been hospitalised and put under observation after police officers in Los Angeles responded to a medical welfare call.

The rapper is being treated for sleep deprivation in Los Angeles after police were called on Monday, People magazine reported.

Kris Jenner, his wife Kim Kardashian's mother, said West was "exhausted" after a "gruelling tour".

Speaking shortly before news broke about her son-in-law's reported hospital treatment, Jenner told reporters at the Angel Ball in New York: "He's exhausted, he's just really tired. He's had a gruelling tour and it's been a grind so he just needs some rest."

She was responding to questions about why West had cancelled his Saint Pablo tour. West, 39, abruptly pulled the plug on his Saint Pablo Tour on Sunday following a series of onstage outbursts in recent days.

A spokesman for the music star confirmed his remaining 21 dates were no longer taking place but no reason was given for the cancellation.

A source told People West was not restrained and "he went freely" to hospital.

The Los Angeles Police Department confirmed it responded to a report of disturbance but the incident was deemed a "medical emergency".

A Los Angeles Fire Department spokesman said: "At 1.20pm, the Los Angeles Fire Department responded to an unspecified medical aid request in the 900 block of North Laurel Avenue.

"An adult male described as medically stable was taken to an area hospital for assessment."

It comes just days after West made comments onstage about how he "would have voted for Donald Trump" and also cancelled a show and ending another after just four songs.

On Saturday, West's concert in Sacramento, California, which he ended early, became a topic of hot conversation on social media as videos circulated of a 10-minute rant by the rapper about Beyonce, Jay Z, Hillary Clinton, Mark Zuckerberg, the radio and MTV.

On Friday, during a concert in San Jose, California, West said he did not vote but would have cast a ballot for Trump, praising the president-elect's "method of communication" as "very futuristic".