I have discussed this issue with the four Police Chief Constables who have advised that there does not appear to be a particular pattern to these tragic incidents.
Rydw i wedi trafod y mater hwn gyda phedwar Prif Gwnstabl yr Heddlu yng Nghymru ac rwyf ar ddeall nad oes patrwm penodol i'r digwyddiadau trasig hyn.