Latest national news on Chattanooga shootings: authorities searching gunman's computer

An FBI investigator investigates the scene of a shooting outside a military recruiting center on Friday, July 17, 2015, in Chattanooga, Tenn. Mohammad Youssef Abdulazeez of Hixson, Tenn., attacked two military facilities on Thursday, in a shooting rampage that killed four Marines. (AP Photo/John Bazemore)

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CHATTANOOGA -- The latest on the Chattanooga shootings (all times local):

8:50 a.m.

A federal law enforcement official says authorities are continuing to search the computer belonging to the gunman who killed four Marines in Chattanooga, but as of Friday morning, haven't found an extensive online presence.

The official says they also haven't uncovered evidence suggesting Muhammad Youssef Abdulazeez was directly inspired by the Islamic State militant group. But the official says the review is continuing.

The official, who asked not to be identified, did not mention any other terrorist-related groups. The official insisted on anonymity because they were not authorized to speak publicly since the investigation is still in progress.

Authorities