"We are very concerned that tension has increased and it may now make our job of clearing the site in a safe and orderly manner even more difficult," said Tony Ball.
We are all concerned about the tensions in Abyei and reports of fighting in recent days.
Concerned about rising tensions in the absence of a result, Buhari urged for calm as the polls closed.
"Along with many other countries, the US is concerned about rising tensions in the South China Sea," Ms Albright told the Association of South-east Asinn NationSingapore in Singapore.
Indian and American officials, who are concerned about rising tensions in the region, have framed the assembly election in the Indian state of Jammu and Kashmir as essential to moving the peace effort forward.
"Some in the leadership are concerned with rising tensions due to inequality of wealth, the demolition of people's homes, the petitioners — there is a sense that something needs to be done," said Victor Shih, a professor of political science at Northwestern University.
Donor countries, concerned about continued tensions between Hamas and rival Palestinian party Fatah, have delivered little of the $5.4 billion pledged for reconstruction.
The disproportionate lack of representation in the police force and local government are not only a cause of concern, but may be related, directly or indirectly, to the tension between concerned citizens and local government.
He remained concerned about the mounting tension between Christians and Muslims.
Concerned about Jewish-Arab tension, a senior Israeli security official said of the indictment: "I hate to say it, but I almost wish it were a Jew.
