A portion of Humanyun's Tomb in Delhi's Nizamuddin area, collapsed on Friday with the authorities saying that eight to nine people are feared trapped.
A call regarding a portion of a dome falling was received around 4.30 pm, a Delhi Fire Services official said.
Eight to nine people are feared trapped and five fire tenders have been rushed, the official said.
The monument is a mid-16th century mausoleum that is frequented by tourists. -- PTI