Natural gas pipeline explodes in Egypt

The cause of the blast, in suburban El Arish, is not immediately clearIn February, a gas pipeline in El Arish was set on fire, officials said

(CNN) -- A pipeline that sends natural gas from Egypt to Israel and Jordan exploded early Wednesday morning, but the cause was not immediately known.

No injuries were immediately reported.

The explosion took place in a suburb of the Egyptian Sinai town of El Arish. In February, a gas pipeline in El Arish that sent natural gas to Jordan was set on fire, officials said.

The state-run MENA news agency said the February incident was a suspected terrorist attack.

It was not clear whether that incident was connected to the political unrest in Egypt.

CNN

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Pa. sees threat to drinking water from natural gas drilling waste

s regulation of gas drilling and came the same day that an industry group said it now believes drilling wastewater is partly at fault for rising levels of bromide being found in Pittsburgh-area rivers.

Gas drilling that uses millions of gallons of chemical-laden water has rapidly grown in the past three years in Pennsylvania.

STORY: Pa. permit process is lax, AP saysSTORY: States scramble to prevent pollution from gas drillingIn other major gas-drilling states, drilling wastewater is kept out of rivers largely by injecting it deep underground into disposal wells. But in Pennsylvania, some wastewater is treated by sewer plants, largely in western Pennsylvania, and discharged into rivers.

Those wastewater plants, however, are ill-equipped to remove all the pollutants, and Pennsylvania still allows hundreds of millions of gallons of the partially treated wastewater to be discharged into rivers, from which communities draw drinking water.

The state Department of Environmental Protection cited elevated levels of bromide in rivers in western Pennsylvania in its announcement.

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