New Delhi, July 6 -- Iran began a procession Monday through its capital, Tehran, for the funeral of the late Supreme Leader Ayatollah Ali Khamenei.

Khamenei's flag-draped coffin, and those of his family killed Feb. 28 in an airstrike at the start of the war launched by Israel and the United States, sat on board a truck. Authorities decorated the truck's side to resemble the ornamental grating that surrounds the shrine of an imam.

The truck crept through crowds of black-clad mourners, who reached out to touch the grating. Some threw scarves and other items for attendants to brush against the coffin, a common practice in Iran seen as a blessing. Attendants sprayed misted water across the crowds to cool them in the summertime temperatures....