Robberies and hijackings up 28%
Robberies, extortion and hijackings soared by 28% in 2010, latest figures show.
The number of killings and the amount of weapons and explosives detected also rose over the year, according to the Central Statistics Office (CSO)
The Garda Recorded Crime Statistics revealed a drop in all other areas of crime including burglaries and thefts, drug offences, road traffic incidents, public order and dangerous acts.
A 51% jump in the number of sexual offence cases was recorded following a review of all allegations, including historic child sex abuse cases.
"Some of these offences will have occurred at some distance in the past but are represented on the date of reclassifications," the CSO said.
Figures showed that just a quarter of the 25,377 burglaries carried out in 2010 were detected, with only 38% of 76,492 thefts solved.
However the detection rate for the 55 murders, five manslaughters and 30 deaths by dangerous driving was 83%.
Criminal charges were brought in 64 cases, while 15 remain undetected.
The highest number of killings were recorded in Dublin's north inner city, with 4.7 deaths per 100,000 people.
The detection rate for drugs offences was also high, with more than 98% of the 19,943 cases closed. There were also 4,092 recorded incidents of weapons and explosives offences, with more than 90% solved.