Fights that broke out at bar time on University Avenue early Sunday morning were quelled by a police sergeant using pepper spray on the combatants. Madison police said the fights started up in a large crowd milling around bars in the 600 block of University Avenue. “The sergeant was monitoring the large crowd,” said police spokesman Joel DeSpain in a news release. “When the fights broke out, the sergeant hoped to keep the violence from escalating and was concerned weapons could become involved.”