SAN FRANCISCO -- Three Oakland residents were charged Tuesday in a spree of armed robberies of stores in and around the Bay Area and subsequent attempts to cover up the crimes, court officials said.

Melvin Landry, Jr., 22, and Dominique Martin, 22, both of Oakland, were charged with conspiracy to commit robbery affecting interstate commerce, robbery affecting interstate commerce and the use of a firearm during and in relation to a crime of violence.

Landry is charged with 4 counts of robbery and using a firearm during those robberies. Martin is charged with 2 counts of robbery and for also using a firearm during those robberies.

According to a previously-filed criminal complaint, between 2012 and part of 2013, Landry and Martin robbed Walmart stores in Fremont, San Leandro, and Sacramento, as well as a Safeway store in Oakland. Each time, they brandished a firearm at employees during the robberies.

The loss amount from these robberies totaled at least $275,000, a large portion of which was cash, Haag stated.

Landry was also charged Tuesday with obstruction of justice and attempted bribery of a federal official. After his initial arrest in early July, Haag said, Landry attempted to offer $60,000 in cash, a Rolex watch and a luxury vehicle to FBI agents if they allowed him to escape.

A third Oakland resident, Cassandra Dam, 29, was charged with making false statements to federal agents in connection with their investigation into Landry and Martin.

Landry and Martin, if found guilty, face up to life imprisonment and a fine of at least $500,000.

Contact Katie Nelson at knelson@bayareanewsgroup.com or follow her at Twitter.com/katienelson210.