Leadership changes could cause infighting, says analyst.
Incident takes place about 600m away from mishap that killed a man less than a week ago.
Clubs step up security at training grounds, stadiums following attacks on players.
Fingerprints lifted from crime scene to be analysed, says IGP.
Police said the attacks took place in Terengganu, Selangor and the latest was in Johor.
Govt unlikely to backtrack on system despite criticism, say experts.
Another individual injured, 17 vehicles damaged, say authorities.
Education Ministry should not be discouraged by World Bank report, but find ways to fix problems, says group.