(CBS/AP) Federal authorities are urging local law enforcement to be vigilant with the one-year anniversary of Osama bin Laden's death just days away, but said there is "no indication of a credible threat or plots against the U.S." linked to the May 2 date.
The FBI, Department of Homeland Security and U.S. Northern Command sent a joint advisory to local and state law enforcement late Wednesday as a reminder that al Qaeda and its affiliates still aspire to attack the U.S.
Radical jihadist web sites continue to advocate attacks on American targets and U.S. officials say emerging al Qaeda affiliates like the Yemen-based al Qaeda in the Arabian Peninsula and the Somalia-based al Shabaab may present the greatest danger.
Authorities frequently issue similar advisories ahead of notable events and anniversaries.
The heightened sense of security was also seen overseas, with the the U.S. Embassy in Pakistan releasing a fresh security warning to Americans in that country.
The embassy said on its website Thursday that its employees would be restricted from restaurants and markets in the capital, Islamabad, for the next two weeks.
It didn't say why, but the period covers the first anniversary of the U.S. raid that killed Osama bin Laden as well.
Militants have been known to stage attacks on or close to the anniversary of significant events.
U.S. diplomats already operate under tight security in Pakistan, which is home to an array of violent extremists.
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