DUBAI—Three journalists working for Al Jazeera have been kidnapped while on assignment in Yemen, the Qatar-based satellite broadcaster said.

Hamid al-Bokari and two members of his crew, Abdulaziz al-Sabri and Moneer al-Sabai, disappeared Monday night and were believed to have been kidnapped in the southern city of Taiz, according to a statement released late Thursday.

Taiz has become a focus of fighting in the 10-month war between Yemen’s Houthi rebels and a Saudi-led regional military coalition, which has left an estimated 6,000 people dead, including nearly 3,000 civilians.

In the statement, Moustefa Souag, Al Jazeera’s acting director general, didn’t indicate who might have abducted the reporters, who work for the broadcaster’s Arabic news service. The broadcaster said it was in contact with “related parties in Taiz” to secure their men’s release but gave no further details.

As the civil war grinds on, shortages of food, water and medical supplies have become widespread. Kidnappings also have become common.