Kanye West swarmed after jumping into lake in Armenia

Police had to shut down Kanye West's impromptu free concert in the Armenian capital of Yerevan early Monday after the U.S. rapper jumped into a lake, inspiring dozens of fans to follow.

• WATCH | Kanye West jumps into Swan Lake

"We're going to do something different right now," the 37-year-old performer of Yeezus exclaimed before leaping into a shallow pond known as Swan Lake.

Within moments, a swarm of fans watching from the other side also jumped into the water, with some getting too close to the American star.

Police and West's security staff quickly leaped into action, escorting the rapper to safety, pushing at least one eager concertgoer out of the way in the process.

West's wife, reality star Kim Kardashian, had announced the free concert to her 31 million followers on Twitter.

According to her, thousands of people turned out for what became a "crazy night."

Can't see the tweet? See it here. 

The surprise concert was the last event on an Armenian tour by Kim Kardashian and family.

West and Kardashian were joined by daughter North and sister Khloe for a four-day visit to the Kardashian ancestral homeland.

The tour included a visit to a complex created in memory of the estimated 1.5 million Armenians killed by Ottoman Turks around the time of the First World War.

The famous family is now in Israel for what was described as a private two-day visit.

North West baptized in Jerusalem

Kardashian and West visited a centuries-old Armenian church in Jerusalem on Monday for the baptism of their daughter.

The Kardashians fended off swooning fans as they entered the Saint James Cathedral in Jerusalem's Old City. Kardashian, appearing overwhelmed, clutched the tiny girl as she was escorted by West, her sister Khloe and hooded clergymen

"Stop," Kim Kardashian shouted to the crowd. "Stop! It's not safe for the baby," her sister added.

The family is expected to shoot some footage for their reality show in Jerusalem before moving on to Jordan.