SEOUL, South Korea — Delegates from North and South Korea held talks Saturday on restarting a stalled joint factory park that had been a symbol of cooperation between the bitter rivals, but there was no word on whether any significant progress had been made as discussions went into the night.

The Kaesong industrial zone, just north of the Demilitarized Zone dividing the two Koreas, was the centerpiece of inter-Korean projects hatched during a previous era of warming ties. But it was closed in April as tensions rose between the rivals when South Korea held military exercises with U.S. troops not far from the border.

North Korea pulled its 53,000 workers out of the industrial park, and South Korea then ordered its managers to leave as well, against their wishes.

Representatives from the two sides met Saturday in the truce village of Panmunjom inside the DMZ for working-level talks. A delegate from South Korea’s Unification Ministry, which is in charge of relations with the North, said before leaving Seoul that the sides would discuss retrieving products that the South Korean managers left behind at the complex and inspecting the facilities. They also agreed to discuss restarting work at the park.

The talks started just before noon, and were still going on Saturday evening.