Monrovia, Liberia
AP

At least 29 people in Liberia, including 11 children and a pregnant woman, have died in a stampede of worshippers at a Christian event in a densely populated area of the capital, Monrovia, officials said Thursday. 

The stampede erupted when a gang of thugs armed with knives attacked some of the hundreds attending the worship event at about 9pm on Wednesday night, police spokesman Moses Carter told The Associated Press.

Monrovia Liberia crowd outside hospital

This photograph provided by Augustine D Wallace shows people gathering at redemption hospital on Thursday, 20th January, where victims of a stampede at a Christian worship event in New Kru Town, outside Monrovia, Liberia, Wednesday night, were taken to. PICTURE: Augustine D Wallace via AP.

One person has been arrested, he said. Rev Abraham Kromah who was holding the ceremony and who runs a church in the New Georgia township of Monrovia was also brought in for questioning about the incident, police said.

The bodies have been taken to the morgue of Redemption Hospital, close to where the incident occurred in a beach area called New Kru Town.

The Red Cross has erected tents near the site for families to come in with photos to identify the bodies of their loved ones. 

Street gangs have become an increasing problem in Monrovia and other Liberian cities in recent years, according to residents.

Liberian President George Weah visited the scene Thursday and declared three days of national mourning. 

“Moving forward,” he said there should be regulations on how these ceremonies, which Liberians call crusades, are conducted. The measures, he said, should limit the number of people who can attend based on the size of the crusade grounds.

Even though “we all are religious people," everyone should be willing to comply with these regulations for safety reasons, he added.