ST. PETERSBURG — Authorities are offering a $10,000 reward for information that could help solve the double-homicide that took place at a Shell gas station last month.PREVIOUS COVERAGE: St. Petersburg police say men were targets in double-homicideIt's been about three weeks since Tywan Jeremiah Armstrong, 39, and Roger Lee Ford Jr., 42, were fatally shot during a large gathering Jan. 21 near the Shell gas station at 34th Street S and 18th Avenue S.A friend of the men told the Tampa Bay Times they saw another car pull up next to their Cadillac, heard arguing, then 13 gunshots. A third shooting victim was also wounded in the attack.St. Petersburg police Chief Tony Holloway said the men were targeted at a well-known gathering spot. There were more than 100 people in attendance. The shooting took place hours after the city’s parade and festivities celebrating Martin Luther King Jr. Day but was not related to the celebration.The St. Petersburg Police Department and federal Bureau of Alcohol, Tobacco, Firearms and Explosives is putting up the reward money and asking the public for help, especially given the number of potential witnesses who were at the scene. Anyone with information that could lead to an arrest and conviction of those responsible for the fatal shooting was asked to call police at (727) 893-7780 or text SPPD plus the tip to TIP411. They can also call federal agents at (813) 663-3932. Contact Kathryn Varn at firstname.lastname@example.org or (727) 893-8913. Follow @kathrynvarn.