Yes the accuser told the police, and the police thought there was suffecient reason to arrest the accused. That's the important difference. Sometimes the police are told, and they interview the accused and don't arrest them. Sometimes they do. The police are (in theory) supposed to have standards for who they arrest.

In the experience of my friends with regards to sexual assaults in North America, there's a substantial gap between 'accuser told the police' and 'arrested'. I can't imagine it would be any closer of a gap in India.