Iranian security forces face a wave of deadly attacks in the restive southeast, reports say.

Incidents over recent weeks caused significant casualties among police and military units.

The violence is concentrated in Sistan and Baluchestan province near the border.

A police major was recently shot dead in the province.

A separate roadside bombing killed a police official, the Fars news agency said.

Insurgent networks appear to be increasing the frequency and lethality of their attacks.

Military reinforcements have been deployed to protect key infrastructure and transport routes.

Commanders are expected to keep border checkpoints on heightened alert.

Read the full article for more details on the attacks in southeastern Iran.