Police attended the scene of a fire at a property in Gortgonis Terrace, Coalisland, at about 23:40 BST on Sunday.
There was no one in either property at the time of the fires and no injuries were reported.
One person is taken to hospital to be treated for smoke inhalation following the fire at a house in the Ballynakilly Road area.
Ógras Youth Centre in Coalisland runs summer schemes for about 450 children.
Connor Magee Campbell, 16, from Clonoe was taken to hospital but later died as a result of his injuries.
There have been 50,000 fish killed in Northern Ireland because of water pollution since 2020.
Police say an object was thrown through the window of an unoccupied flat in Limavady and two petrol bombs were thrown at a house in Coalisland.
The business had only been open for one day.
Figures show there were almost 150 animal dumping incidents in Northern Ireland since 2020.
