AUSTIN, Texas — Two people were injured in another explosion in Texas’ capital Sunday night, and police are not ruling out a connection to the three previous explosions that detonated earlier this month elsewhere in the city. The latest blast occurred around 8:30 p.m. in a suburban neighborhood known as Travis Country in southwest Austin — far from the previous three that were all in residential areas in the eastern part of the city — and investigators didn’t immediately confirm what caused it.