The Taliban militant group has claimed responsibility for twin suicide blasts against an intelligence centre on Darulaman Road in the Afghan capital Kabul on Monday.
The location of the blasts is close to the Afghan parliament and the Russian Embassy.
After explosions, gunfire also heard in the western part of Kabul.
An Afghan security source said that two gunmen attacked the house of a tribal elder in Kabul belonging to a former deputy head of the National Directorate of Security (NDS) of the southern Helmand region, Naeem Baloch.
More than one explosion and gunfire were heard during the attack.
No information has been officially released regarding whether there were any causalties, but according to Tolo News, an Afghan news agency, at least four people have been injured, including two children.
KABUL BLAST: Eyewitnesses told http://t.co/QMk7XnJ1u2 at the scene that at least 4 people, including 2 children injured in blast
— TOLOnews (@TOLOnews) October 5, 2015
According to local media, power was cut and many families were being evacuated in the area around the cordoned-off scene of the attacks.
Meanwhile, Afghan forces who were fighting the Taliban requested the US air strike that killed 22 people at a hospital run by aid group Doctors Without Borders (MSF) on Saturday in Kunduz, the US commander of international forces in Afghanistan said on Monday.
Contrary to previous statements by the US military that its own troops were under fire and had called in the strike, US Army General John Campbell stressed that US forces were not under direct fire in the strike and Afghan forces had not called air strikes on the behalf of the US.
"We have now learned that on October 3 Afghan forces advised that they were taking fire from enemy positions and asked for air support from U.S. forces," Campbell said in a briefing with reporters.