Nuclear power plants are beefing up security checks on workers following

, according to NRC spokesman Neil Sheehan.

The report was prompted by the discovery that suspected al-Qaida terrorist Sharif Mobley worked as a laborer at six nuclear plants between 2002 and 2008, including Three Mile Island in Dauphin County. Mobley is charged with homicide in Yemen after shooting a hospital guard there. According to the report,

.

The report recommends additional terrorist identification training, better NRC access to criminal databases, more frequent rescreening of employees and possibly requiring employees to disclose foreign travel.

Sheehan said requirements to gain access to nuclear plants are “already quite robust” and include background checks, psychological screening, and behavior observations.

According to the report, Mobley made comments that could have been construed suspicious, telling one employee, “We are brothers in the union, but if a Holy War comes, look out.” He also visited unusual websites, including one that showed a mushroom cloud, the report said.