UPDATED: April 3, 2019  7:58 AM

FRISCO, Texas (CBSDFW.COM) – Arson investigators are looking into four fires that were set outside homes in Frisco early Wednesday morning, and two of those fires was inside mailboxes.

The fires happened at homes in the 8100 block of Nicholson Drive near Teel Parkway.

The Frisco fire department says two recycling containers were torched at two homes, as well as the contents of two mailboxes at two other homes.

(Credit: CBS 11 News)

Officials say they have an arson investigator looking into the fires.

There were no reported injuries and no descriptions of any persons of interest at this time.