UPDATE 1-Heavy security in China's Xinjiang, stability urged

* Uneasy calm returns to riot-torn Chinese city

* Security forces concentrate in Uighur areas

* Officials stress aim of restoring stability

(Updates with injury data)

By Chris Buckley

URUMQI, China, July 12 (Reuters) - An uneasy calm returned on Sunday to China's riot-hit Urumqi where 184 people died in ethnic violence a week ago, though the official tally of dead could rise, a regional official indicated.

Shops were open and heavy traffic returned to the streets of Urumqi, capital of the Xinjiang region, where Uighurs, a largely Muslim people, rioted and attacked Han Chinese, who form the majority of China's 1.3 billion population.

Security forces massed in Uighur neighbourhoods on Sunday as officials set stability as their top priority.

According to the official count, 137 of those killed were Han Chinese and 46 were Uighurs who share cultural bonds with Central Asian peoples [ID:nSP463729].