WASHINGTON (Reuters) – The FBI arrested a Mississippi man on Wednesday in connection with letters sent to President Barack Obama and two other officials that are believed to have contained the deadly poison ricin, the U.S. Justice Department said.

Paul Kevin Curtis was arrested at his home in Corinth, Mississippi, and is “believed to be responsible for the mailings of the three letters sent through the U.S. Postal Inspection Service which contained a granular substance that preliminarily tested positive for ricin,” the Justice Department said in a statement.

WASHINGTON (Reuters) – Authorities are investigating a letter addressed to President Barack Obama after the contents preliminarily tested positive for the deadly poison ricin, the second report of such a letter in two days.

The FBI said the envelope was received at a mail screening facility outside the White House and was immediately quarantined.

WASHINGTON (Reuters) – A letter addressed to President Barack Obama contained a substance that preliminarily tested positive for the deadly poison ricin, authorities said on Wednesday.

News that the letter to Obama was being investigated came as a flurry of other reports of suspicious letters and a package caused the temporary evacuation of parts of two Senate buildings and set nerves on edge in Washington.

WASHINGTON, April 16 (Reuters) – President Barack Obama put
his weight behind legislation unveiled by a bipartisan group of
senators on Tuesday to reform the U.S. immigration system and
urged lawmakers to advance it quickly.

“This bill is clearly a compromise, and no one will get
everything they wanted, including me. But it is largely
consistent with the principles that I have repeatedly laid out
for comprehensive reform,” Obama said in a statement after being
briefed by two of the senators involved in crafting the bill,
Democrat Chuck Schumer and Republican John McCain.

WASHINGTON (Reuters) – President Barack Obama vowed on Monday that the United States will find out who carried out explosions in Boston and will hold them accountable, and a White House official said the twin blasts are being treated as an “act of terror.”

“We still do not know who did this or why, and people shouldn’t jump to conclusions before we have all the facts,” Obama said in a televised statement. “But make no mistake, we will get to the bottom of this, and we will find out who did this, we’ll find out why they did this.”