A study carried out by TOLOnews shows that October was the deadliest month in the past two years.
According to figures presented by security departments, more than 6,000 insurgents, nearly 500 security forces and more than 700 civilians were killed or wounded in October.
The report says that insurgents' movements increased in October against September and that security forces mostly carried out offensives in response to insurgent activities.
TOLOnews has recorded 1,164 security incidents in the month of October that shows an increase of 21 percent compared to September.
Security forces conducted 662 ground operations. Military operations carried out by security forces increased by 26 percent in the month of October.
October was a busy month for the insurgents and they increased their activities by 18 percent. In addition to bombings, kidnappings and rocket attacks, they carried out 143 group attacks.
"The insurgents' movements reduced in the month of September and the security forces have had a chance to prevent their activities in the month of October. But it did not happen and insurgents' movements increased in October," said Sayed Abbas Hussaini, TOLOnews researcher.
Nearly 4,153 insurgents were killed and 2,000 others wounded in October - the casualty toll among them increasing by 23 percent.
The casualty toll among security forces also increased by 24 percent in October. In this month around 397 soldiers were killed and 83 others wounded.
Civilians also bore the brunt of violence in October with casualties up 55 percent against September. Around 125 civilians including women and children lost their lives due to violence and 617 others were wounded in October.
"The insurgents through the increase of their attacks tried to show they are powerful. But recently their attacks have been reduced and it is because they had lots of casualties," said Dawlat Waziri, spokesman of ministry of defense.
In the month of October, Nangarhar, with 125 security incidents, Helmand with 96 incidents, Farah with 95 incidents and Kunduz with 74 were the most insecure provinces in the country.
"This season is a good chance for security forces to attack insurgents and clear them from the regions they are active in," said Abdullah Qara Loq, secretary of Meshrano Jirga (the Upper House of Parliament).