A bomb mailed to an East Palo Alto home, where it detonated last month injuring one person, has ignited a federal investigation, a U.S. Postal Service spokesman said Tuesday.
On Friday, Nov. 24, a similar incident occurred in Alameda, when a bomb mailed to a home on Bay Farm Island also exploded and resulted in one injury, spokesman Jeff Fitch said.
In the East Palo Alto case, the package was delivered on Oct. 19 and left a resident with non-life-threatening injuries, Fitch said.
East Palo Alto police, San Mateo County sheriff's deputies and bomb squad and postal inspectors responded to the incident, Fitch said.
There have been no other similar incidents reported in the Bay Area besides the two.
Fitch declined to provide the dimensions of each parcel or the addresses to which they were delivered. It's not clear whether the two explosions are connected.
The Postal Service's crime lab outside Washington, D.C. will investigate evidence from both cases. The materials in the East Palo Alto detonation have already been sent while the ones from Alameda await transport.
Investigators have yet to identify the sender, but whoever mailed the bomb faces "serious federal felonies," Fitch said.
The two people injured in the explosions are expected to survive, he said.
Anyone who receives a suspicious package in the mail is advised to set the parcel aside, refrain from touching the item and call 911.