Unusual high volumn traded

Today as usual, logged into my account to check on share price after market closed. Discovered some unusual transactions being traded, there are a number of counters traded with huge volumn at 10 minutes before closed or 16:50 to be exact.

There are not just one or two counters but plenty of them ( I just checked a few of my favorite counters)

The buying pattern does not favor to a particular sector, like banking or just plantation. The counters involved include big-chips, mid-cap and also some penny stocks.

The following are some of the counters:-

MAYBANK  RM8.40  4684
PCHEM    RM5.41  2882
AXIATA   RM4.73 13632 
MAYBANK  RM8.40  4684
SCOMI    RM0.34  3485
CIMB     RM8.70  7962
KNM      RM2.14  2138
SIME     RM8.78  5494
IOICORP  RM5.78 11476
MPHB     RM2.22  1751
BJCORP   RM1.07  2497
BJTOTO   RM4.25  1672
GENTING RM10.80  3145 

and more.


Curious, could these be due to some institutes are buying or foreign investors are pouring money into BursaMalaysia?
 
Do leave your comment if you know anything about it, help me to clear my curiousity.