BAGHDAD, Jan. 12 (Xinhua) -- Iraqi security forces detained 25 insurgent suspects and seized explosives and mortar bombs during massive operations in Baghdad early on Tuesday, a military spokesman said.
Qassim Atta, spokesman for Baghdad Operations Command, said in a statement that his troops confiscated 200 kg of C4 explosives, 200 kg of TNT, 60 mortar rounds and some 250 litre of ammonium nitrate which is used for making bombs during the search operations conducted early Tuesday morning.
The troops also arrested 25 people suspected of plotting terrorist attacks in Baghdad, Atta said.
Earlier in the day, Iraq security forces blocked a large part of Baghdad to conduct the operations in several neighborhoods of the capital, causing large-scale lockdowns.
The operations left hundreds of civilian cars trapped on Tuesday morning as dozens of police and Iraqi Army checkpoints blocked streets, bridges and neighborhoods for hours.
A police source told Xinhua that the Iraqi forces mainly focused their search operations on eastern Baghdad neighborhoods, including the Shiite bastion of Sadr City, which has long been the stronghold of Mahdi Army militia, loyal to radical Shiite cleric Moqtada al-Sadr.
The source could not give the reason behind such sudden and wide-ranging operations, but said they are possibly based on tip-off on bomb attacks in the capital.
Baghdad has witnessed a number of high-profile bomb attacks in the past months, which mainly targeted government buildings killing and wounding thousands of Iraqis.
U.S. military and Iraqi officials said that they expect more violence ahead of the country's landmark parliamentary elections slated for March 7.