I don't see anything regarding a quake in Bangladesh. There are aftershocks way up north in the Andaman Islands though; that could have been someone getting a had location/magnitude for one of those.
It was reported on Drudge. link is broken now. I read through the article and the link is still on drudge (to the right)
Looks like the 8.5 quake has ruptured the fault line for hundreds of miles. If the theory of Plate Tectonics is correct, then there are multiple stress points along a single fault line and a powerful enough earthquake can cause each stress point to rupture in sequence creating a large earthquake swarm in the region.