A man armed with a samurai sword barricaded himself inside a home near Serene Avenue and Las Vegas Boulevard.
The incident began just after midnight Monday when a man called police saying his adult son was wielding a sword and acting erratically.
The man's father, mother and daughter were able to escape the home, but a 98-year-old woman is still trapped inside.
Police say they used caution because the man came toward officers with the sword.
The standoff ended around 8:30 a.m. The suspect was taken into custody and the 98-year-old woman was unharmed.