(Adds location, news conferences called in Nairobi and Yaounde)

YAOUNDE, May 6 (Reuters) - A Kenya Airways plane that went missing on Saturday with 114 passengers and crew on board was found on Sunday in swamps southeast of Cameroon's Douala airport, the central African country's state radio said.

The radio quoted a working group created by Cameroon's prime minister to handle the crisis as saying the craft had been found in mangrove swamps near Dizangue, southeast of Douala airport.

The Boeing 737-800 aircraft, which was carrying 114 people from more than 20 countries, went missing on Saturday shortly after taking off from Douala for Nairobi in torrential rain.

The radio did not mention casualties or survivors.

An aviation official declined to give any details, but confirmed there was a ground team at the site and a search party was trying to reach the area by helicopter.

Cameroon's territorial administration ministry called a news conference at short notice and Kenyan government officials in Nairobi called journalists back to an unscheduled news conference there too.

Kenya Airways <KQNA.NR> Group Managing Director Titus Naikuni told a Nairobi news conference on Sunday an air and ground search had been widened from southern Cameroon to swamp land some 40 km (25 miles) from Douala where fishermen reported a loud noise the night of the crash.

Earlier in the day, Cameroon's state radio station reported the plane had been found near Mvengue, more than 100 km (60 miles) further south, only to say later it could not confirm the report.

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