Watch CCTV show people running from arson attack
Three cars were set alight in Llanharan and Rhydyfelin, in Rhondda Cynon Taf on 27 December.
BBC News
Rhydyfelin is a large village and part of the community of Pontypridd Town, about two miles to its south east of Pontypridd, in the county borough of Rhondda Cynon Taf. It is on the eastern bank of the River Taff close to the A470, and historically was in the parish of Eglwysilan.
Three cars were set alight in Llanharan and Rhydyfelin, in Rhondda Cynon Taf on 27 December.