Sass files not getting loaded in angular2 while using webpack

I am trying to integrate a date-picker component which has sass files.

So, while running npm start I am getting this Error message

ERROR in ./src/app/shared/date-picker/component/idatepicker-dates.sass Module parse failed: src\app\shared\date-picker\component\idatepicker-dates.sass Unexpected character '@' (1:0)

What I guess is either the sass loader is not working or I am using an incorrect sass loader.

Appreciate any help on this.

I am using webpack for this. Below are the relevant files used:

package.json :

"devDependencies": {
    "@types/es6-shim": "0.31.32",
    "@types/jasmine": "2.5.36",
    "@types/node": "6.0.46",
    "angular2-template-loader": "0.5.0",
    "codelyzer": "0.0.28",
    "css-loader": "0.25.0",
    "extract-text-webpack-plugin": "1.0.1",
    "file-loader": "0.9.0",
    "html-loader": "0.4.4",
    "html-webpack-plugin": "2.22.0",
    "htmlhint-loader": "1.0.0",
    "jasmine-core": "2.5.2",
    "json-loader": "0.5.4",
    "karma": "1.3.0",
    "karma-chrome-launcher": "2.0.0",
    "karma-coverage": "1.1.1",
    "karma-jasmine": "1.0.2",
    "karma-phantomjs-launcher": "1.0.2",
    "karma-webpack": "1.8.0",
    "less": "2.7.1",
    "less-loader": "2.2.3",
    "node-sass": "^4.5.2",
    "null-loader": "^0.1.1",
    "raw-loader": "0.5.1",
    "rimraf": "^2.5.4",
    "sass-loader": "^6.0.3",
    "style-loader": "0.13.1",
    "ts-helpers": "1.1.1",
    "ts-loader": "0.8.2",
    "tslint": "3.15.1",
    "tslint-loader": "2.1.5",
    "typescript": "2.0.10",
    "url-loader": "0.5.7",
    "webpack": "1.13.2",
    "webpack-dev-server": "1.15.1",
    "webpack-fail-plugin": "1.0.5",
    "webpack-md5-hash": "0.0.5",
    "webpack-merge": "0.14.1",
    "yargs": "5.0.0"
  }

webpack.common.js

 loaders: [
      {
        test: /\.ts$/,
        loaders: ['ts', 'angular2-template'],
        exclude: /node_modules/
      },
      {
        test: /\.html$/,
        loader: 'html'
      },
      {
        test: /\.less$/,
        loaders: ['raw', 'less'],
        include: path.resolve('src/app')
      },
      {
        test: /\.less$/,
        loader: ExtractTextPlugin.extract('style', 'css!less'),
        include: path.resolve('src/styles')
      },
      {
          test: /\.css$/,
          exclude: /node_modules/,
          loader: 'style-loader!css-loader!autoprefixer-loader'
      },
      {
          test: /\.scss$/,
          loader: 'style-loader!css-loader!autoprefixer-loader!sass loader',
          exclude: '/node_modules/'
      },
      {
        test: /\.(png|jpg|jpeg|svg|gif|woff|woff2|ttf|eot)(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'file'
      }
    ]
  },

via Sashi Kant