YANGON, Myanmar (AP) — Myanmar is careening deeper into crisis as police occupy hospitals and universities and reportedly arrest hundreds of people involved in protesting last month’s military seizure of power, while a coalition of labor unions calls a strike for Monday. Tension was high in the country’s biggest city, Yangon, where for a second night running gunshots from heavy weapons rang out randomly in the streets of several neighborhoods after the start of an 8 p.m. curfew. Large protests have occurred daily across many cities and towns in Myanmar, and security forces have responded with ever greater use of lethal force and mass arrests.