**US Arrests Suspect in Poison Letter Sent to Obama**
U.S. investigators say a suspect in Mississippi has been arrested in connection with a poisoned letter sent to U.S. President Barack Obama.
The FBI said suspect Paul Kevin Curtis was arrested Wednesday in Corinth, Mississippi. Investigators did not provide further details.
However, an FBI intelligence bulletin seen by reporters said the suspect April 8 letter to Mr. Obama and a second one addressed to U.S. Senator Roger Wicker were postmarked in Memphis, Tennessee and contained some identical wording.
Both letters preliminarily tested positive for ricin, a highly poisonous chemical compound that is deadly in amounts as small as a grain of salt.
Investigators said both letters were intercepted at mail screening facilities away from the White House and Senate offices and consequently did not place either the president or the senator in immediate danger.
**Massive Explosion of Texas Fertilizer Plant**
A massive explosion at a fertilizer plant in Texas Wednesday evening has
injured dozens of people and left an unknown number of people dead..
Local firefighters were battling a fire at the plant in the town of West,
located just outside the city of Waco, when the blast occurred. An official with the Texas Department of Public Safety says between 50-75 houses near the plant were destroyed, and that many residents were injured.
Various news outlets have said at three people have been killed, but authorities will not give an exact number. An official with the Waco police department says some firefighters are missing.
Many residents of the community were evacuated, including a nursing home with over 100 residents. Emergency crews are still conducting a house-to-house search within the blast area to find anyone who may still be trapped. Authorities did not say how the initial fire started at the plant.
A nearby high school football field was turned into emergency staging area to treat the victims.
Texas Governor Rick Perry says state resources have been mobilized to provide assistance to local authorities. Emergency crews from dozens of nearby towns and counties traveled to West to assist with the response.