A rally in Malaysia held to show solidarity with anti-government protesters in Hong Kong is being investigated as an illegal gathering.“We will be calling them in under the Peaceful Assembly Act as they did not inform police … We have opened an investigation paper,” confirmed criminal investigation department chief Gunalan Muniandy of Kuala Lumpur’s Dang Wangi police station on Monday.He said officers would be interviewing participants, including the organisers, this week.Student activist…