Four hostages in bank robbery near Athens

A man who took hostages in a bank robbery in Athens' port of Piraeus on Monday released some of them but still held four captive, police said.
The bank robber fired shots in the air, police said, adding that no one had been injured. Negotiators were talking with him to convince him to free the remaining hostages.
"There are four hostages in the bank, the rest have been freed," a senior police official told Reuters.
Three men had stormed into a National Bank of Greece branch around midday. "Two of them were chased and arrested and the third one returned to the bank and held people hostage," a police spokesman said.
The hostage taker was holding a gun and told police he also had a hand grenade.
Another official had said earlier that, according to preliminary information, 14 people were initially held hostage.