Comodo Firewall Blocking Intrustions by Windows Operating System - Concern?

Hello, my Comodo Firewall has recently been blocking the following:

Application: Windows Operating System
Action: Blocked
Direction: Out
Protocol: ICMP
Source IP: My IP
Source Port: Type(3)
Destination IP: Other IPs
Destination Port: Code(3)

Since yesterday (when it first started), the firewall blocked around 30 of these instances.

Basically, I want to know if I should be concerned if there is someone intruding on my network or any other concerns.

I appreciate any assistance! Thanks!