PITTSBURGH — An aggressive mosquito known to carry the West Nile virus was found in Pittsburgh, prompting local health officials to warn the public and spray insecticide.

Allegheny County Health Department spokesman Guillermo Cole said the Asian Tiger mosquito doesn't bite only at dawn and dusk like most mosquitoes. Cole said the Asian Tiger mosquitoes "will bite more people more often."

The health department sprayed for the mosquitoes in West Mifflin late last month. More spraying was done Monday night in Pittsburgh's Strip District.

The West Nile virus first appeared in Allegheny County in 2002 when it killed four people. The county has not found any humans with the virus since 2007.

SCRANTON — Former President Bill Clinton is taking a swing through eastern Pennsylvania today to raise money and campaign for Democratic candidates on the fall ballot.Clinton is scheduled to start in Scranton today where he will headline a rally for U.S. Senate candidate Joe Sestak.While in the Navy, Sestak served in the Clinton White House as director for defense policy on the National Security Council.After that, Clinton is appearing at fundraisers for Congressional candidate John Callahan in the Lehigh Valley and gubernatorial candidate Dan Onorato in Philadelphia.

HARRISBURG — All the third-party candidates in Pennsylvania who are seeking to be listed on the November ballot for governor and U.S. Senate are being challenged.The challenges were filed in Commonwealth Court on Monday — the deadline for contesting candidates who are not Republicans or Democrats.In the race to succeed Sen. Arlen Specter, challenges were filed against the petitions of Green Party member Mel Packer and the Libertarian Party's Douglas Jamison.Libertarian Marakay Rogers and Tea Party candidate John Krupa were challenged in the campaign to succeed Democratic Gov. Ed Rendell, who will step down in January.All four candidates had collected at least the 19,082 signatures required for statewide candidates. The challengers will seek to disqualify enough signatures to keep them off the ballot.

HARRISBURG — Pennsylvania's insurance commissioner is taking a job in the Obama administration.Gov. Ed Rendell said Monday that Joel Ario will help roll out a crucial function of the new national health care law. He'll direct the creation of the competitive marketplaces where individuals and small businesses can shop for a health insurance plan.The so-called health insurance exchanges are to take effect in each state in 2014. Ario's job is in the new Office of Consumer Information and Insurance Oversight.

PHILADELPHIA — Two $1 million-winning Powerball tickets were sold in Pennsylvania.There's no word yet on exactly where in the state the winning tickets were sold, but officials said the winners matched the first five numbers drawn Saturday — along with the Power Play multiplier option.Florida, Texas and Connecticut each also produced a million-dollar winner.