WASHINGTON—The U.S. recorded an increase in Taliban attacks from Afghan forces for March right after signing a peace deal with the insurgent team, a authorities watchdog business office said Friday, contrary to hopes that the agreement would direct to much less violence.

The Particular Inspector General for Afghanistan Reconstruction, or Sigar, said the U.S. armed forces claimed that Taliban attacks amplified earlier mentioned levels witnessed for March in earlier several years. Having said that, the Pentagon said it wouldn’t permit Sigar to release the actual numbers, classifying…