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Lebanese troops fight street battles in northern city of Tripoli against Muslim militants

  • A Lebanese army soldier opens fire during clashes with Islamic militants in the northern port city of Tripoli, Lebanon, Sunday, Oct. 26, 2014. The Lebanese army brought tanks and commando forces into the northern city of Tripoli Sunday, where fighting with Muslim militants has intensified and spread to nearby areas. (AP Photo/Bilal Hussein)

    A Lebanese army soldier opens fire during clashes with Islamic militants in the northern port city of Tripoli, Lebanon, Sunday, Oct. 26, 2014. The Lebanese army brought tanks and commando forces into the northern city of Tripoli Sunday, where fighting with Muslim militants has intensified and spread to nearby areas. (AP Photo/Bilal Hussein)  (The Associated Press)

  • Lebanese army soldiers carry the coffin, wrapped in the national flag, of Lebanese soldier Mohammed Ali Yaseen, who was killed Saturday in a clash with Islamic Militants in Tripoli, during his funeral procession in the southern village of Kfar Tibnit, Lebanon, Sunday, Oct. 26, 2014. Lebanese army tanks pounded Muslim militants' positions in the narrow streets of a poor neighborhood in this northern city Sunday, where fighting has intensified and spread to nearby areas where gunmen killed several soldiers. (AP Photo/Mohammed Zaatari)

    Lebanese army soldiers carry the coffin, wrapped in the national flag, of Lebanese soldier Mohammed Ali Yaseen, who was killed Saturday in a clash with Islamic Militants in Tripoli, during his funeral procession in the southern village of Kfar Tibnit, Lebanon, Sunday, Oct. 26, 2014. Lebanese army tanks pounded Muslim militants' positions in the narrow streets of a poor neighborhood in this northern city Sunday, where fighting has intensified and spread to nearby areas where gunmen killed several soldiers. (AP Photo/Mohammed Zaatari)  (The Associated Press)

  • A Lebanese army soldier aims his weapon during clashes with Islamic militants in the northern port city of Tripoli, Lebanon, Sunday, Oct. 26, 2014. The Lebanese army brought tanks and commando forces into the northern city of Tripoli Sunday, where fighting with Muslim militants has intensified and spread to nearby areas. (AP Photo/Bilal Hussein)

    A Lebanese army soldier aims his weapon during clashes with Islamic militants in the northern port city of Tripoli, Lebanon, Sunday, Oct. 26, 2014. The Lebanese army brought tanks and commando forces into the northern city of Tripoli Sunday, where fighting with Muslim militants has intensified and spread to nearby areas. (AP Photo/Bilal Hussein)  (The Associated Press)

The Lebanese army has brought tanks and commando forces into the northern city of Tripoli where fighting with Muslim militants has intensified.

Several tanks, armored personnel carriers and Humvees carrying commandos arrived Sunday on the edge of the neighborhood of Bab Tabbaneh that is witnessing the heaviest clashes.

Tripoli's fighting broke out Friday night and has so far killed five troops, two civilians and wounded many others.

On Wednesday, troops killed three militants and detained a local leader in a raid in the northern Dinniyeh region. The Dinniyeh raid sparked the clashes in Lebanon's second largest city.

Sunni militants inspired by al-Qaida and the Islamic State extremist group have killed and wounded several soldiers in a string of attacks in recent months.