Since March the Pakistan Taliban has unleashed a wave of attacks on Pakistani security forces, killing 40 soldiers.
Rebels have stepped up attacks on security forces in northwest Pakistan, raising fears of a revival of their activity and a return of lawlessness near the border region with Afghanistan.
But since March, the al-Qaeda-linked Pakistan Taliban, facing the risk of losing havens on the Afghan side of the border if its Afghan Taliban allies make peace there, has unleashed a wave of attacks on Pakistani security forces.
Bolstering its bid to re-establish itself in the borderlands, the Pakistan Taliban, or Tehreek-e-Taliban Pakistan (TTP), struck an alliance in July with half a dozen small rebel factions.
"The group's capability and military strength has increased, as has their reach," said Mansur Khan Mahsud, executive director of the Islamabad-based FATA Research Centre.
September has seen near-daily incidents, from roadside bombs to sniper attacks, to ambushes and the killing of residents accused of collaborating with government forces.
The rebels have killed at least 40 soldiers since March, according to a Reuters tally of official figures.
At least 109 people were killed in 67 attacks between January and July - twice the number of 2019, according to the FATA Research Centre.
"TTP's regrouping is concerning both because of its own activities and its links to groups like al-Qaeda," said Elizabeth Threlkeld, a former State Department official who served in Pakistan, now deputy-director for the South Asia programme at the Washington-based Stimson Center.
"It could again provide significant support to international terror groups if it continues to regain ground."
In February, the Afghan Taliban and the United States struck a deal allowing for the withdrawal of US forces in exchange for Afghan Taliban guarantees they would not harbour other rebels.
The United Nations said in a report in July there were more than 6,000 Pakistani fighters in Afghanistan, most affiliated with the TTP, who could be heading home if they lose their refuge.
"It's a concern for everyone," a Western security official based in Pakistan told Reuters on condition of anonymity.
Pakistan's military did not respond to a request for comment on the violence but its spokesman said on Twitter recently that the attacks were "meant to derail (the) Afghanistan Peace Process".
For those living in the area, insecurity is again becoming a daily worry.
The TTP issued a statement this week telling residents to leave "until peace returns".
"Our war against Pakistan is continuing and you will continue to see daily attacks," the group said.
