Need help on a Extended ACL command! Pls help, thanks!

[AlphonseElric]

Hi people,

I have a question on Ext-ACL. Please help..

Users in IT Dept network (192.168.3.0) should not be able to ping or access KL Dept network (192.168.3.0) and vice versa.
Both IT Dept and KL Dept should be able to access the internet.

So my acl command is:
deny ip 192.168.3.0 0.0.0.255 host 192.168.3.0 eq icmp
deny ip 192.168.5.0 0.0.0.255 host 192.168.5.0 eq icmp
permit any any

Is my command correct?
A friend of time told me that, my command will block the respective network from accessing the internet and everything else as well?
Is it true?

Please help people! Urgent! Thanks!!!