Johore Mentri Besar to seize back Malay land

‘(18 November 2014) – The Johor government will seize Malay reserved land which had fallen into the hands of the non-Malays.
 
Menteri Besar Datuk Seri Khaled Nordin said several action plans will be
enforced to seize the land which rightfully belong to the Malays.’
Quoted from an article in TRE.
 
What does this statement mean? How could Malay reserved land fell into
non Malay hands? In