Police arrested four people Wednesday night in connection with a bank robbery in which a teller pregnant with twins was shot

Police arrested four people Wednesday night in connection with a bank robbery in which a teller pregnant with twins was shot, but the suspected gunman remained at large.Four men were arrested on preliminary charges of conspiracy to commit robbery after police questioned people. At least three of those questioned were taken into custody after a raid at a home.The robbery occurred about Tuesday morning when a masked gunman entered a Huntington Bank branch, jumped over the counter screaming, shot teller Katherin Shuffield and grabbed cash from her drawer, police said.Shuffield, 30, is five months pregnant with twins and was shot in the abdomen. Her husband, Jason Shuffield, said Wednesday that she remained in critical but stable condition.Chief Michael Spears said the shooting was the most important case being worked on by city police.The men arrested were ages 25 to 33.