Another explosion reported in bomb-wary Austin

AUSTIN, Texas  — Two men were taken to the hospital with serious but non-life threatening injuries after another explosion reported in Austin, Texas, authorities said.

Police were called to the scene at 8:32 p.m., in a city that has been rattled by a series of blasts.

The two injured men were in their 20s and taken to St. David's South Austin Medical Center, according to an Austin-Travis County EMS tweet. Both patients are in good condition, a spokesperson at the hospital told CNN.

Police and the FBI responded to the scene Sunday. There was a second item, a backpack that police were clearing, said Austin Police Chief Brian Manley.

"It's obvious an explosion has occurred," he said at a late Sunday briefing.

The latest explosion comes less than a week after police said three package explosions that happened over 10 days were connected. Those explosions killed a man and a teenager, and injured two others.

The victims in those three explosions were African-American or Hispanic. Police have not yet discovered a motive, but have not ruled out the possibility the bombs could be hate crimes.

It's not clear if Sunday's explosion is related to the previous events.

The Sunday incident was reported on Dawn Song Drive, with police warning residents in the immediate area to stay inside their homes until further instruction from officers.

Reward increased

Austin police say the reward for information leading to the arrest of whoever is responsible for three explosions that have killed two people and injured two others has risen by $50,000 to now total $115,000.

Interim Police Chief Bryan Manley announced the reward boost Sunday as authorities pleaded for help.

Officials believe the bombings this month are related but Manley says investigators don't have a motive or "what the ideology is behind this."

He says more than 500 officers, including federal agents, have conducted 236 interviews in following up 435 leads.

A package bomb exploded at an east Austin home on March 2, killing a 39-year-old man. Two package bombs in other parts of the city exploded last Monday, killing a 17-year-old, wounding his mother and injuring a 75-year-old woman.