KANSAS CITY, Mo. (AP) — A fire official says about 10 people were sickened by a suspicious package in the mailroom of a sprawling IRS building in downtown Kansas City, Missouri. 
 
 Kansas City Fire Department spokesman James Garrett says 10 people complained of feeling ill, including vomiting and sweating, after the package arrived at the building Friday. He says two people were taken to a hospital. 
 
 St. Luke's Hospital spokeswoman Laurel Gifford says those victims are in good condition. 
 
 Garrett says the Fire Department was checking for gasses and fumes but hasn't determined the package's contents. He says the package was isolated from the public. 
 
 The building was not evacuated and has returned to business. 
 
 Garrett says the investigation has been turned over to the IRS and other federal authorities. ||||| Washington (CNN) Eleven people fell ill after a suspicious letter was opened in an administrative building at Joint Base Fort Myer-Henderson Hall in Arlington, Virginia, on Tuesday, according to the Arlington County Fire Department. 
 
 A law enforcement official said field tests for the letter all came back negative for any harmful substance, but the FBI is transporting it tonight to its lab in Quantico for further analysis. 
 
 Of the 11 individuals who felt ill, three were transported to a local hospital and are in a stable condition, a spokesperson for the department said. 
 
 "An envelope containing an unknown substance was received, today, aboard Joint Base Ft. Myer-Henderson Hall. Personnel in the affected building took immediate preventative measures by evacuating the building," according to Maj. Brian Block, a US Marine Corps spokesperson. 
 
 "Base officials and are coordinating with local HAZMAT teams and FBI. Several Marines are receiving medical care as a result of this incident. No additional details are available at this time as the investigation is ongoing," Block said. 
 
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– About 10 people were sickened after a suspicious package arrived in the mailroom of an IRS building in Kansas City, Missouri, Friday morning, a fire official tells the AP. Symptoms included vomiting and sweating; two of the people were taken to a hospital but are in good condition. The package's contents have not yet been determined, but the fire department is checking for gasses and fumes. The building was not evacuated, but the package has been isolated from the public. Law enforcement is investigating, the Kansas City Star reports.