51.   Russian authorities had expressed concern Thursday that the rebels were seizing power violently in some towns and villages in the republic.

52.   Singapore authorities have expressed concern at the growing popularity of the designer drug, a mildly hallucinogenic amphetamine, among young people.

53.   Taipei authorities have also expressed concerns over the demolition, sources said.

54.   The Bosnian Serb authorities had expressed doubts that those trying to return were in fact genuine residents, the statement said.

55.   The authorities have also expressed concern that opening renminbi yuan business broadly to the outside world could have a negative impact on efforts to keep a lid on inflation.

56.   The authorities have expressed concern about numbers of breakups.