Two banks were held up at gunpoint Tuesday morning within a block or two of each other along Rockville Pike, but it appeared the proximity in time and location may have been mere coincidence.

One holdup involved a single robber and the other involved two, Montgomery County police said. In the second, they said, no money was taken but a robber fired a shot. No injuries were reported. Detectives did not think the incidents were related, county police said.

The first robbery took place about 9:30 a.m. at the SunTrust branch in the 1400 block of Rockville Pike. The robber showed a gun at a drive-through window, demanded money and got cash, the police said. In the other incident, would-be robbers demanded money from a teller about 11 a.m. at the Wells Fargo branch in the 100 block of Congressional Lane. After one vaulted the counter and the other fired a handgun into the ceiling, both left empty-handed, police said.