At the beginning of the 20th century, 2,500 of Monrovia’s 4,000 residents were Americo-Liberian. Monrovia was divided into two sectors: Monrovia proper, and Krutown. Monrovia proper was where the city's Americo-Liberian population resided; the architectural style of its buildings was reminiscent of that of the southern United States. Krutown was inhabited mainly by ethnic Krus, but also by Bassas, Grebos and members of other ethnic groups. By 1926, ethnic groups from Liberia's interior had begun migrating to Monrovia in search of jobs. By 1937, Monrovia’s population had grown to 10,000, and it had 30 police officers.