NEW YORK (AP) — Oil prices fell Friday along with the prospects for global economic growth as the government reported the US economy added no jobs last month.

Benchmark crude fell US$2.48, or 2.8 per cent, to finish at US$86.45 on the New York Mercantile Exchange after the Labor Department said employers stopped adding jobs in July. The unemployment rate remained at 9.1 per cent.

The US jobs report follows a weak manufacturing report from China and concerns that the lingering debt crisis in Europe continues to hold back economic growth there.

Put together, concerns are growing that the global economy is weakening. A weak economy reduces demand for oil and oil products such as diesel, jet fuel, and gasoline because fewer goods are shipped and people travel and commute less.

“We were doomy and gloomy before the jobs report and then the jobs number became the crescendo of all the bad news,” said Phil Flynn, an analyst at PFGBest. “The big story is the global economic slowdown.”

Brent crude, used to price oil in many international markets, fell US$1.96 to end at US$112.33 per barrel In London.

Oil was also pushed down as the dollar rose against the euro and some other currencies. Oil is priced in dollars and becomes more expensive to buyers with foreign currency — and less attractive — as the dollar get stronger.

Also, a Libyan official said Friday that five foreign oil and gas companies have returned to Libya to resuscitate production choked off by civil war and sanctions.

This encouraged traders that Libyan oil might begin flowing sooner than hoped, though most expect it to be several months before significant exports resume.

Concerns about the economy, the dollar and increased supply from Libya overwhelmed worries that Tropical Storm Lee in the Gulf of Mexico might interrupt oil production and push prices higher.

The storm has forced several oil companies to evacuate non-essential personnel from rigs in the region. Forecasters expect the storm to dump a foot (30 centimeters) or more of rain on parts of Louisiana starting this weekend.

“Several days of decreased oil and gas production and major inland flooding are clear concerns with this system,” said Bob Haas, Weather Operations Manager and Meteorologist at MDA EarthSat in a report.

In other energy trading, heating oil fell 5.44 cents to finish at US$2.9974 per gallon and gasoline futures lost 5.31 cents to finish at US$2.8396 a gallon. Natural gas fell 17.8 cents, or 4.4 per cent, to end the day at US$3.872 per 1,000 cubic feet.