JAKARTA—Indonesia will tighten social restrictions for two weeks starting Tuesday, a government minister said, after a surge in coronavirus cases in the world’s fourth most populous country. The curbs will apply to “red zones” where cases have been rising sharply this month, Coordinating Economic Minister Airlangga Hartarto told a streamed news conference on Monday. The tightened regulations will mean that offices, restaurants, cafes, and malls in such areas will only be permitted to operate at 25 percent capacity. Religious activities at all houses of worship in red zones will be temporarily suspended, and tourist attractions closed. Vital sectors, such as basic services, can operate at 100 percent capacity with stricter health protocols, while office capacity in non-red zone areas will be 50 percent. Areas that have been designated as red zones include the regions of Kudus in Java, Bangkalan on Madura island, the capital Jakarta and parts of Riau, in …