According to sources in the Home Ministry, the West Bengal government's report, received by it on June 17, stated these reasons among others as factors responsible for the violence in Darjeeling.
It said the unrest started after an agitation programme, organised by the Gorkha Janmukti Morcha (GJM) on June 5, that led to blocking of the state highways.
The situation started to worsen from June 8 onwards after three processions taken out by the GJM at Gorkha Rang Manch bhawan, situated about 100 metres away from the Governor's house, turned violent.
The agitators, who are mainly from the GJM, are demanding a separate state of Gorkhaland.
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The report suggests that elections to Gorkhaland Territorial Administration (GTA), that includes Darjeeling and other neighbouring areas, could be a reason behind the ongoing violence, they said.
Bimal Gurung headed GJM dominates the GTA. In 2012, the GJM secured all the 45 seats--22 in Darjeeling sub-division, 10 in Kurseong and 13 in Kalimpong--under the GTA.
The West Bengal government's report, which was sent to the Home Ministry on June 17, mentions the status as on June 13. It mainly gives details the way protests were carried out, they said.
In all, 24 cases have been registered by police. A total of 49 security force personnel have been injured in the violence, the sources added.
The situation is tense but under control, they said.
Both Union Home minister Rajnath Singh and Home Secretary Rajiv Mehrishi have spoken to the state administration over the issue.
Darjeeling hills had seen a violent movement for a separate Gorkhaland in the mid 1980s under Subhash Ghisingh.
The movement ended with the establishment of a semi- autonomous administrative body in 1988 called Darjeeling Gorkha Hill Council (DGHC), which was headed by Ghisingh.
As Ghisingh's influence waned over time, the GJM launched another movement for a separate state of Gorkhaland. In 2011, the GJM signed an agreement with the state and central governments and another semi-autonomous administrative unit GTA was born replacing the DGHC.
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