The markets closed lower with the Dow plummeting 107 points to 10,340 after revelations that European banks may be holding more risky debt than originally disclosed.

The Rosen Law Firm initiated an investigation into China-Biotics Inc. (Nasdaq: CHBT) for possible federal securities law violations sending the stock price tumbling $1.40 to close at $10.65....

Casey's General Stores Inc. (Nasdaq: CASY) rejected Alimentation Couche-Tard's $38.50 per share acquistion offer to pursue a $40 per share cash offer from an unnamed suitor. The stock price soared $3.86 to close at $42.76....

GT Solar International Inc. (Nasdaq: SOLR) stockholder GT Solar Holdings will sell 10 million of its common shares sending the stock price down $1.02 to close at $7.76....

Renewed concerns about risky European bank debt sent the markets down during the midday with the Dow falling 80 points to 10,368.

SAN FRANCISCO (Reuters) - Hewlett-Packard Co sued former Chief Executive Mark Hurd and asked a court to block him from joining Oracle Corp, saying his hiring by the rival technology firm puts HP's trade secrets "in peril."

TORONTO/SINGAPORE (Reuters) - China's state-owned Sinochem Corp has invited Temasek, the Singapore sovereign wealth fund, to join a consortium that may bid for Canada's Potash Corp , the world's largest fertilizer supplier, sources with knowledge of the matter said on Tuesday.

NEW YORK (Reuters) - U.S. regulators are probing certain practices around "quote stuffing," where large numbers of rapid-fire stock orders are placed and canceled almost immediately, Securities and Exchange Commission Chairman Mary Schapiro said on Tuesday.

NEW YORK (Reuters) - The top U.S. securities regulator said on Tuesday that the follow-up report on what might have caused the May "flash crash" is expected by the end of September.

CHICAGO (Reuters) - The Food and Drug Administration has warned beverage makers Dr Pepper Snapple Group Inc and Unilever for making improper statements regarding green tea on product labels and web sites.

BIRMINGHAM, Alabama (Reuters) - An Alabama judge said on Tuesday he would appoint a receiver to oversee the sewer system revenues of debt-ridden Jefferson County, in a setback for county authorities.

WASHINGTON (Reuters) - A U.S. judge refused on Tuesday to lift a ban on federal funding of human embryonic stem cell research despite Obama administration warnings it would set back key research and cost more than a thousand jobs.

FORT COLLINS, Colo. (Reuters) - Court proceedings for a Colorado couple accused of abusing three girls adopted from Russia were postponed on Tuesday after a defense lawyer told a judge that plea negotiations were under way.

NEW YORK (Reuters) - The governor of Connecticut on Tuesday unveiled a plan to reduce the state's $34 billion in unfunded pension and health care liabilities, including capping individual pensions at $100,000 per year.

CHICAGO (Reuters) - Chicago Mayor Richard M. Daley said on Tuesday he will not run for reelection to a seventh term in February, saying simply that it was the right time for him to leave.

UNITED NATIONS (Reuters) - The death toll from weekend clashes at a refugee camp in Sudan's violence-torn Darfur region has risen to nine, the United Nations said on Tuesday.

WASHINGTON (Reuters) - A U.S. government team will travel to Seoul, Tokyo and Beijing next week to discuss North Korea but has no plans to visit the poor, isolated state or meet its officials, the State Department said Tuesday.

WASHINGTON (Reuters) - The United States does not plan to contribute to a NATO request for 2,000 troops for the Afghan war, the Pentagon said on Tuesday, even as the head of the alliance held out the possibility of U.S. participation.

BAGHDAD (Reuters) - Two U.S. soldiers were killed and nine others wounded in an attack inside an Iraqi army compound Tuesday, the U.S. military said.

MADRID (Reuters) - Spain's Prime Minister Jose Luis Rodriguez Zapatero said Tuesday ETA had to lay down its arms forever, after the Basque separatist group declared a ceasefire.